<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:7f27e0c8-113b-4c22-9bd1-511717228373,g:4945acb1-37ee-4703-80b0-1dcae546dc21-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/Cover" xlink:type="simple" xlink:href="fang-20210331.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/Cover" xlink:type="extended" id="i0b266c98baec4718825dad6adf0b7db1_Cover"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="fang-20210331.xsd#CondensedConsolidatedBalanceSheetsUnaudited"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="extended" id="i59de6adcd0b143e28b867445b1c34bac_CondensedConsolidatedBalanceSheetsUnaudited"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CondensedConsolidatedBalanceSheetsUnauditedParentheticals" xlink:type="simple" xlink:href="fang-20210331.xsd#CondensedConsolidatedBalanceSheetsUnauditedParentheticals"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CondensedConsolidatedBalanceSheetsUnauditedParentheticals" xlink:type="extended" id="ia3f5eca890cd4d98b7d03110f55ae79b_CondensedConsolidatedBalanceSheetsUnauditedParentheticals"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CondensedConsolidatedStatementsofOperationsUnaudited" xlink:type="simple" xlink:href="fang-20210331.xsd#CondensedConsolidatedStatementsofOperationsUnaudited"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CondensedConsolidatedStatementsofOperationsUnaudited" xlink:type="extended" id="i69dd4d85e78e4a92830b13e7ef6062bd_CondensedConsolidatedStatementsofOperationsUnaudited">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_732636f3-b4c4-4aa4-b3e7-4607d3fc6a1a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_RevenuesAbstract_732636f3-b4c4-4aa4-b3e7-4607d3fc6a1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d7d7fd78-da6b-4f8c-a38e-aa7fecf9cab7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_732636f3-b4c4-4aa4-b3e7-4607d3fc6a1a" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d7d7fd78-da6b-4f8c-a38e-aa7fecf9cab7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncome_bce46783-5b2d-4057-9c66-74b5525a0968" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherOperatingIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_732636f3-b4c4-4aa4-b3e7-4607d3fc6a1a" xlink:to="loc_us-gaap_OtherOperatingIncome_bce46783-5b2d-4057-9c66-74b5525a0968" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_129a15fe-7b59-472a-90d9-cfc0c8de707b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_732636f3-b4c4-4aa4-b3e7-4607d3fc6a1a" xlink:to="loc_us-gaap_Revenues_129a15fe-7b59-472a-90d9-cfc0c8de707b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseExpense_9a874561-b8f4-432e-9f09-198e5131abfb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:to="loc_us-gaap_OperatingLeaseExpense_9a874561-b8f4-432e-9f09-198e5131abfb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductionTaxExpense_8dcf5c40-7b15-4c8d-ba7c-3ec3c49605fb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProductionTaxExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:to="loc_us-gaap_ProductionTaxExpense_8dcf5c40-7b15-4c8d-ba7c-3ec3c49605fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_edf859d5-c7db-43f5-93eb-b7915fa4cae7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_edf859d5-c7db-43f5-93eb-b7915fa4cae7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_fce94c01-8157-481b-aec6-38e05fd581aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_fce94c01-8157-481b-aec6-38e05fd581aa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfOilAndGasProperties_9f804191-ef92-44b2-afab-428db53cadb3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOfOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:to="loc_us-gaap_ImpairmentOfOilAndGasProperties_9f804191-ef92-44b2-afab-428db53cadb3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ImpairmentOfMidstreamAssets_dcc1706b-2ded-4251-965b-0c24b183927f" xlink:href="fang-20210331.xsd#fang_ImpairmentOfMidstreamAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:to="loc_fang_ImpairmentOfMidstreamAssets_dcc1706b-2ded-4251-965b-0c24b183927f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_8cb5aed2-9717-480b-96df-6cb8da33a5ee" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_8cb5aed2-9717-480b-96df-6cb8da33a5ee" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_Mergerandintegrationexpense_e043d953-9b20-4023-926a-0b246e8a9837" xlink:href="fang-20210331.xsd#fang_Mergerandintegrationexpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:to="loc_fang_Mergerandintegrationexpense_e043d953-9b20-4023-926a-0b246e8a9837" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_4d891d7a-0df5-4d87-a6ee-b3961acba5f3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_4d891d7a-0df5-4d87-a6ee-b3961acba5f3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_9a7d2f66-ac27-4a07-ab6b-32a55c2078fd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_bb669a26-ae2d-4ddf-b8b4-4286df7be913" xlink:to="loc_us-gaap_CostsAndExpenses_9a7d2f66-ac27-4a07-ab6b-32a55c2078fd" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_2b3c8628-ae8c-427f-a1b1-a2dc3bebf83b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_OperatingIncomeLoss_2b3c8628-ae8c-427f-a1b1-a2dc3bebf83b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_7f950040-6a4e-4893-ac2c-22bab8fed553" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_OtherIncomeAndExpensesAbstract_7f950040-6a4e-4893-ac2c-22bab8fed553" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_5c936251-2bb8-416a-9326-9b465771ebf0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7f950040-6a4e-4893-ac2c-22bab8fed553" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_5c936251-2bb8-416a-9326-9b465771ebf0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncome_d23f96c1-c2cb-4264-ad40-6ef3e873ffd3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonoperatingIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7f950040-6a4e-4893-ac2c-22bab8fed553" xlink:to="loc_us-gaap_OtherNonoperatingIncome_d23f96c1-c2cb-4264-ad40-6ef3e873ffd3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_cb59cce5-dc53-4d45-aacf-d6534b7e14c1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7f950040-6a4e-4893-ac2c-22bab8fed553" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_cb59cce5-dc53-4d45-aacf-d6534b7e14c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_bdef0cae-55ad-4331-88bd-8bb537180b5d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7f950040-6a4e-4893-ac2c-22bab8fed553" xlink:to="loc_us-gaap_GainLossOnInvestments_bdef0cae-55ad-4331-88bd-8bb537180b5d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_5179cf21-dca0-4de1-b53c-a37289baae90" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7f950040-6a4e-4893-ac2c-22bab8fed553" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_5179cf21-dca0-4de1-b53c-a37289baae90" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_045cc6e8-43f3-47d6-aa01-8f450e7dc388" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7f950040-6a4e-4893-ac2c-22bab8fed553" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_045cc6e8-43f3-47d6-aa01-8f450e7dc388" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_1450542a-b51a-419c-9f91-67f5f5b749b5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7f950040-6a4e-4893-ac2c-22bab8fed553" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_1450542a-b51a-419c-9f91-67f5f5b749b5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_aa706683-f840-4e95-b96a-a1a19974893d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_aa706683-f840-4e95-b96a-a1a19974893d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9d6618ed-6c72-43c9-b56b-b016830550af" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_9d6618ed-6c72-43c9-b56b-b016830550af" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_81795f77-40df-4310-8bc6-6ec2e816bd19" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_ProfitLoss_81795f77-40df-4310-8bc6-6ec2e816bd19" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_9d9bd2d8-92a7-43c4-a701-f0aad0f31b9b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_9d9bd2d8-92a7-43c4-a701-f0aad0f31b9b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_2c1ddc53-531e-49ba-b406-0c98238a62a7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_NetIncomeLoss_2c1ddc53-531e-49ba-b406-0c98238a62a7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_ae556826-a246-4570-b0b5-7e91c776513e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_EarningsPerShareAbstract_ae556826-a246-4570-b0b5-7e91c776513e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_2cfabeb1-5cca-48f9-b342-64274d29fecc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_ae556826-a246-4570-b0b5-7e91c776513e" xlink:to="loc_us-gaap_EarningsPerShareBasic_2cfabeb1-5cca-48f9-b342-64274d29fecc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_f736f7c1-f7ea-4f0e-bad8-7dd5c91e18d8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_ae556826-a246-4570-b0b5-7e91c776513e" xlink:to="loc_us-gaap_EarningsPerShareDiluted_f736f7c1-f7ea-4f0e-bad8-7dd5c91e18d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_75814f9f-2d59-44c2-aa73-6cbaf5b8c877" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_75814f9f-2d59-44c2-aa73-6cbaf5b8c877" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_0b2a368a-57df-4f5a-ba71-1ef1aa1d1cb2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_75814f9f-2d59-44c2-aa73-6cbaf5b8c877" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_0b2a368a-57df-4f5a-ba71-1ef1aa1d1cb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_6db129e9-286e-4d49-aecc-1ba73d0c7bb6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_75814f9f-2d59-44c2-aa73-6cbaf5b8c877" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_6db129e9-286e-4d49-aecc-1ba73d0c7bb6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_192f24ab-4c25-46ac-9b01-cef5fcd5c15f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_192f24ab-4c25-46ac-9b01-cef5fcd5c15f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_a27f971a-ec1e-4982-9c61-2903522977d7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_da6283c1-48ba-4f56-b193-ed5005f243e0" xlink:to="loc_us-gaap_StatementTable_a27f971a-ec1e-4982-9c61-2903522977d7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_2af648ab-4744-420f-b649-63f4a8d7a0ed" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_a27f971a-ec1e-4982-9c61-2903522977d7" xlink:to="loc_srt_ProductOrServiceAxis_2af648ab-4744-420f-b649-63f4a8d7a0ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_2af648ab-4744-420f-b649-63f4a8d7a0ed_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_2af648ab-4744-420f-b649-63f4a8d7a0ed" xlink:to="loc_srt_ProductsAndServicesDomain_2af648ab-4744-420f-b649-63f4a8d7a0ed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_28a501c3-4388-41be-94d5-6ce17e49d705" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_2af648ab-4744-420f-b649-63f4a8d7a0ed" xlink:to="loc_srt_ProductsAndServicesDomain_28a501c3-4388-41be-94d5-6ce17e49d705" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_OilExplorationandProductionMember_d194fba2-315f-43b1-8a84-461a4b942857" xlink:href="fang-20210331.xsd#fang_OilExplorationandProductionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_28a501c3-4388-41be-94d5-6ce17e49d705" xlink:to="loc_fang_OilExplorationandProductionMember_d194fba2-315f-43b1-8a84-461a4b942857" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasProductionMember_7f569655-ae70-4b65-90ae-2c3793ad6839" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NaturalGasProductionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_28a501c3-4388-41be-94d5-6ce17e49d705" xlink:to="loc_us-gaap_NaturalGasProductionMember_7f569655-ae70-4b65-90ae-2c3793ad6839" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NaturalGasLiquidsProductionMember_d863c77d-f27e-4981-b635-116c3da911af" xlink:href="fang-20210331.xsd#fang_NaturalGasLiquidsProductionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_28a501c3-4388-41be-94d5-6ce17e49d705" xlink:to="loc_fang_NaturalGasLiquidsProductionMember_d863c77d-f27e-4981-b635-116c3da911af" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasMidstreamMember_e348f9b8-e9ff-498e-8f72-df41aa34e16f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NaturalGasMidstreamMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_28a501c3-4388-41be-94d5-6ce17e49d705" xlink:to="loc_us-gaap_NaturalGasMidstreamMember_e348f9b8-e9ff-498e-8f72-df41aa34e16f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasGatheringTransportationMarketingAndProcessingMember_f1d17695-266f-4a7d-8192-2c37696e0a53" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NaturalGasGatheringTransportationMarketingAndProcessingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_28a501c3-4388-41be-94d5-6ce17e49d705" xlink:to="loc_us-gaap_NaturalGasGatheringTransportationMarketingAndProcessingMember_f1d17695-266f-4a7d-8192-2c37696e0a53" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CondensedConsolidatedStatementsofStockholdersEquityUnaudited" xlink:type="simple" xlink:href="fang-20210331.xsd#CondensedConsolidatedStatementsofStockholdersEquityUnaudited"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CondensedConsolidatedStatementsofStockholdersEquityUnaudited" xlink:type="extended" id="ie71a7565b68b4009b0f35989ba97b418_CondensedConsolidatedStatementsofStockholdersEquityUnaudited">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_e916a7c4-c6cc-4973-bd61-0d396130b938" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e916a7c4-c6cc-4973-bd61-0d396130b938" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_4ac60f52-8b9a-4717-85f5-8fc87bc0c3e9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_4ac60f52-8b9a-4717-85f5-8fc87bc0c3e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_1ef9f276-0a84-4d2e-8d33-3022cfe19403" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_1ef9f276-0a84-4d2e-8d33-3022cfe19403" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NoncontrollingInterestIncreasefromUnitbasedCompensation_93a63657-d1e1-4e1c-b274-289e25fcb1c3" xlink:href="fang-20210331.xsd#fang_NoncontrollingInterestIncreasefromUnitbasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_fang_NoncontrollingInterestIncreasefromUnitbasedCompensation_93a63657-d1e1-4e1c-b274-289e25fcb1c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_LimitedPartnersCapitalAccountDistributionEquivalentRightsPayments_e2464d26-48da-4ace-8c39-e15386ab5a06" xlink:href="fang-20210331.xsd#fang_LimitedPartnersCapitalAccountDistributionEquivalentRightsPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_fang_LimitedPartnersCapitalAccountDistributionEquivalentRightsPayments_e2464d26-48da-4ace-8c39-e15386ab5a06" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_758ca4d9-03cd-47a2-9a41-8d8b6f09a74f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_758ca4d9-03cd-47a2-9a41-8d8b6f09a74f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_ce00b351-ebe9-4bdd-ad6c-0fa16b639ee0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_ce00b351-ebe9-4bdd-ad6c-0fa16b639ee0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_a9efec4e-2c0a-46ce-8fd5-cbecaad5225d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_a9efec4e-2c0a-46ce-8fd5-cbecaad5225d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AdjustmentToAdditionalPaidInCapitalRepurchasedSharesForTaxWithholding_64c8824f-7785-4d3f-9891-8d71b19f2d78" xlink:href="fang-20210331.xsd#fang_AdjustmentToAdditionalPaidInCapitalRepurchasedSharesForTaxWithholding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_fang_AdjustmentToAdditionalPaidInCapitalRepurchasedSharesForTaxWithholding_64c8824f-7785-4d3f-9891-8d71b19f2d78" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_84f4ca41-cdae-4aed-8cf7-f4331b4b1615" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_84f4ca41-cdae-4aed-8cf7-f4331b4b1615" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_42c18f1d-ffe8-4928-a9d9-878f91abc66e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_42c18f1d-ffe8-4928-a9d9-878f91abc66e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_57aacfe5-95ea-4d7c-b423-41aff7fb362f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_57aacfe5-95ea-4d7c-b423-41aff7fb362f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_059d4bdc-fdd6-40b0-86e1-dc24b6bc52e4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_DividendsCommonStockCash_059d4bdc-fdd6-40b0-86e1-dc24b6bc52e4" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_bb7993e2-3b88-431b-9dd3-e9f18e90404f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_bb7993e2-3b88-431b-9dd3-e9f18e90404f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_a79f8017-b6a8-42c5-b04a-cc6cb04dd5a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_a79f8017-b6a8-42c5-b04a-cc6cb04dd5a9" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet_e982025a-6eb2-4e62-8ae2-61ad47d2bb2d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet_e982025a-6eb2-4e62-8ae2-61ad47d2bb2d" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_77af2447-21eb-4c38-9498-818dd60cd7b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_95d9d0dd-585f-4122-9b25-4c7ad83aba41" xlink:to="loc_us-gaap_ProfitLoss_77af2447-21eb-4c38-9498-818dd60cd7b9" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_b3173cb8-86d0-4ace-8c8b-3f1c1e35fb24" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_09cf2cf4-2b93-4900-8672-6c67602ec6be" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_21122717-90e4-423c-903d-3825938b996c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_e916a7c4-c6cc-4973-bd61-0d396130b938" xlink:to="loc_us-gaap_StatementTable_21122717-90e4-423c-903d-3825938b996c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_d26c8cc2-566f-42e8-b4e7-5182b9c40bbf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_21122717-90e4-423c-903d-3825938b996c" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_d26c8cc2-566f-42e8-b4e7-5182b9c40bbf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_d26c8cc2-566f-42e8-b4e7-5182b9c40bbf_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_d26c8cc2-566f-42e8-b4e7-5182b9c40bbf" xlink:to="loc_us-gaap_EquityComponentDomain_d26c8cc2-566f-42e8-b4e7-5182b9c40bbf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_f289d880-c38c-4f4d-bbb3-e86fd9cfc999" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_d26c8cc2-566f-42e8-b4e7-5182b9c40bbf" xlink:to="loc_us-gaap_EquityComponentDomain_f289d880-c38c-4f4d-bbb3-e86fd9cfc999" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_37fa3ff6-2966-4e1d-bd39-e69627698f1a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_f289d880-c38c-4f4d-bbb3-e86fd9cfc999" xlink:to="loc_us-gaap_CommonStockMember_37fa3ff6-2966-4e1d-bd39-e69627698f1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_bbac5401-531a-438e-a5b0-0b84379dfaaa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_f289d880-c38c-4f4d-bbb3-e86fd9cfc999" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_bbac5401-531a-438e-a5b0-0b84379dfaaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_917057a2-4d2a-4249-ac3e-872f9623a261" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_f289d880-c38c-4f4d-bbb3-e86fd9cfc999" xlink:to="loc_us-gaap_RetainedEarningsMember_917057a2-4d2a-4249-ac3e-872f9623a261" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_c5edeee8-910d-405e-8736-0c4d406988be" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_f289d880-c38c-4f4d-bbb3-e86fd9cfc999" xlink:to="loc_us-gaap_NoncontrollingInterestMember_c5edeee8-910d-405e-8736-0c4d406988be" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="simple" xlink:href="fang-20210331.xsd#CondensedConsolidatedStatementsofCashFlowsUnaudited"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="extended" id="ib7a767b8add349f99e78eb624de01f80_CondensedConsolidatedStatementsofCashFlowsUnaudited"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATION" xlink:type="simple" xlink:href="fang-20210331.xsd#DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATION"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATION" xlink:type="extended" id="i4f724aece155445cb3631c2b4cfa54e2_DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATION"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATIONDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATIONDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATIONDetails" xlink:type="extended" id="i77e8d587172d471aab2df34463013b4a_DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATIONDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestLineItems_93502e95-7ea1-49b4-b3ea-4540a6e0f1cd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_748fa69d-e341-4759-994a-77b5492504cd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_93502e95-7ea1-49b4-b3ea-4540a6e0f1cd" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_748fa69d-e341-4759-994a-77b5492504cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestTable_2503b367-3ee5-490e-94b3-cad13d7848d4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MinorityInterestLineItems_93502e95-7ea1-49b4-b3ea-4540a6e0f1cd" xlink:to="loc_us-gaap_MinorityInterestTable_2503b367-3ee5-490e-94b3-cad13d7848d4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_1908343f-9ecb-42f8-a92e-9c210b4158ec" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_2503b367-3ee5-490e-94b3-cad13d7848d4" xlink:to="loc_srt_OwnershipAxis_1908343f-9ecb-42f8-a92e-9c210b4158ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_1908343f-9ecb-42f8-a92e-9c210b4158ec_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_1908343f-9ecb-42f8-a92e-9c210b4158ec" xlink:to="loc_srt_OwnershipDomain_1908343f-9ecb-42f8-a92e-9c210b4158ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_a4a2859a-e0de-4f1b-8ff9-19e1d2372642" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_1908343f-9ecb-42f8-a92e-9c210b4158ec" xlink:to="loc_srt_OwnershipDomain_a4a2859a-e0de-4f1b-8ff9-19e1d2372642" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperEnergyPartnersLPMember_00a3b97b-1d9e-4879-b5ca-a46a1c56eb4a" xlink:href="fang-20210331.xsd#fang_ViperEnergyPartnersLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_a4a2859a-e0de-4f1b-8ff9-19e1d2372642" xlink:to="loc_fang_ViperEnergyPartnersLPMember_00a3b97b-1d9e-4879-b5ca-a46a1c56eb4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerMIdstreamLPMember_0ca389e8-3bde-4126-97d9-d74b5c340a66" xlink:href="fang-20210331.xsd#fang_RattlerMIdstreamLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_a4a2859a-e0de-4f1b-8ff9-19e1d2372642" xlink:to="loc_fang_RattlerMIdstreamLPMember_0ca389e8-3bde-4126-97d9-d74b5c340a66" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES" xlink:type="simple" xlink:href="fang-20210331.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES" xlink:type="extended" id="i2f72d6d9131245c9988177a3dcbf0d09_SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies" xlink:type="simple" xlink:href="fang-20210331.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies" xlink:type="extended" id="if837a1a6ccfd4651b52391ee45a9e2ef_SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables" xlink:type="simple" xlink:href="fang-20210331.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables" xlink:type="extended" id="i82f432bfb6f74cc5a178a1d99fac054b_SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESCashCashEquivalentsandRestrictedCashDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESCashCashEquivalentsandRestrictedCashDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESCashCashEquivalentsandRestrictedCashDetails" xlink:type="extended" id="i22b56c686034411c9cca69b5ebf62dcc_SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESCashCashEquivalentsandRestrictedCashDetails"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERS" xlink:type="simple" xlink:href="fang-20210331.xsd#REVENUEFROMCONTRACTSWITHCUSTOMERS"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERS" xlink:type="extended" id="ief75ccbd84784358ad8a6875c90a64bb_REVENUEFROMCONTRACTSWITHCUSTOMERS"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERSTables" xlink:type="simple" xlink:href="fang-20210331.xsd#REVENUEFROMCONTRACTSWITHCUSTOMERSTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERSTables" xlink:type="extended" id="ic172185a58d24e3bb30c5aca5576c4d5_REVENUEFROMCONTRACTSWITHCUSTOMERSTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERSDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#REVENUEFROMCONTRACTSWITHCUSTOMERSDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERSDetails" xlink:type="extended" id="i2969f29a80304aad98cd48dd7b52958d_REVENUEFROMCONTRACTSWITHCUSTOMERSDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_f204a7d5-fcfc-45f0-9535-0bfbdfc6e30d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_af31664e-300e-4ef7-830d-cf154bd0c47b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_f204a7d5-fcfc-45f0-9535-0bfbdfc6e30d" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_af31664e-300e-4ef7-830d-cf154bd0c47b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_1f69d1dd-c5f6-4e45-bf27-19dbfe1d7f21" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_f204a7d5-fcfc-45f0-9535-0bfbdfc6e30d" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_1f69d1dd-c5f6-4e45-bf27-19dbfe1d7f21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_2bfa4b68-c18c-4874-964d-f85e886e4de7" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_1f69d1dd-c5f6-4e45-bf27-19dbfe1d7f21" xlink:to="loc_srt_ProductOrServiceAxis_2bfa4b68-c18c-4874-964d-f85e886e4de7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_2bfa4b68-c18c-4874-964d-f85e886e4de7_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_2bfa4b68-c18c-4874-964d-f85e886e4de7" xlink:to="loc_srt_ProductsAndServicesDomain_2bfa4b68-c18c-4874-964d-f85e886e4de7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_ebbc4014-a264-46ff-8c65-edac18f3554d" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_2bfa4b68-c18c-4874-964d-f85e886e4de7" xlink:to="loc_srt_ProductsAndServicesDomain_ebbc4014-a264-46ff-8c65-edac18f3554d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_OilIncomeMember_59f62ebc-47a4-4812-a869-0bc7f5a6a311" xlink:href="fang-20210331.xsd#fang_OilIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ebbc4014-a264-46ff-8c65-edac18f3554d" xlink:to="loc_fang_OilIncomeMember_59f62ebc-47a4-4812-a869-0bc7f5a6a311" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NaturalGasIncomeMember_ebfd8729-ffa2-4ca3-9b0c-517ed3142d1b" xlink:href="fang-20210331.xsd#fang_NaturalGasIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ebbc4014-a264-46ff-8c65-edac18f3554d" xlink:to="loc_fang_NaturalGasIncomeMember_ebfd8729-ffa2-4ca3-9b0c-517ed3142d1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NaturalGasLiquidsIncomeMember_689f3b8e-a720-4e13-b697-ed751c2cd501" xlink:href="fang-20210331.xsd#fang_NaturalGasLiquidsIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ebbc4014-a264-46ff-8c65-edac18f3554d" xlink:to="loc_fang_NaturalGasLiquidsIncomeMember_689f3b8e-a720-4e13-b697-ed751c2cd501" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_6de2f5af-ef8b-453d-aee5-162434c23497" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_1f69d1dd-c5f6-4e45-bf27-19dbfe1d7f21" xlink:to="loc_srt_MajorCustomersAxis_6de2f5af-ef8b-453d-aee5-162434c23497" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_6de2f5af-ef8b-453d-aee5-162434c23497_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_6de2f5af-ef8b-453d-aee5-162434c23497" xlink:to="loc_srt_NameOfMajorCustomerDomain_6de2f5af-ef8b-453d-aee5-162434c23497_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_52f6225f-96b2-45c9-ae62-5c1391b1cdb2" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_6de2f5af-ef8b-453d-aee5-162434c23497" xlink:to="loc_srt_NameOfMajorCustomerDomain_52f6225f-96b2-45c9-ae62-5c1391b1cdb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_MidlandBasinMember_510ff2de-15d7-4a35-9f8c-5e62bb2ce78d" xlink:href="fang-20210331.xsd#fang_MidlandBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_52f6225f-96b2-45c9-ae62-5c1391b1cdb2" xlink:to="loc_fang_MidlandBasinMember_510ff2de-15d7-4a35-9f8c-5e62bb2ce78d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DelawareBasinMember_fc05cc27-8b6a-4a8c-a850-ca4d62c7962c" xlink:href="fang-20210331.xsd#fang_DelawareBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_52f6225f-96b2-45c9-ae62-5c1391b1cdb2" xlink:to="loc_fang_DelawareBasinMember_fc05cc27-8b6a-4a8c-a850-ca4d62c7962c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCustomerMember_6ca13251-8774-4066-9cba-6c21fac27e36" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_52f6225f-96b2-45c9-ae62-5c1391b1cdb2" xlink:to="loc_us-gaap_OtherCustomerMember_6ca13251-8774-4066-9cba-6c21fac27e36" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONS" xlink:type="simple" xlink:href="fang-20210331.xsd#ACQUISITIONS"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONS" xlink:type="extended" id="i320b79b339b84c6386f1ede25901489e_ACQUISITIONS"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSTables" xlink:type="simple" xlink:href="fang-20210331.xsd#ACQUISITIONSTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSTables" xlink:type="extended" id="i97b1c0f44b4c49819541c44ccd27f134_ACQUISITIONSTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSNarrativeDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#ACQUISITIONSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSNarrativeDetails" xlink:type="extended" id="ia186bd66cb8b43f3963acf6238c6afba_ACQUISITIONSNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AreaOfLand_f4a14672-5b1e-4f22-bad4-bbd47883da1d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AreaOfLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_us-gaap_AreaOfLand_f4a14672-5b1e-4f22-bad4-bbd47883da1d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_4206dee5-f4b9-4763-807d-cb6ffd0cf6f3" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_4206dee5-f4b9-4763-807d-cb6ffd0cf6f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_PaymentsForAssetAcquisitions_6b2bc08d-1511-479f-ad6d-9b0a23b5762f" xlink:href="fang-20210331.xsd#fang_PaymentsForAssetAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_fang_PaymentsForAssetAcquisitions_6b2bc08d-1511-479f-ad6d-9b0a23b5762f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionNumberOfAdditionalWells_14c6e7a1-d7c1-459f-ab2b-afc973acfce8" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionNumberOfAdditionalWells"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_fang_AssetAcquisitionNumberOfAdditionalWells_14c6e7a1-d7c1-459f-ab2b-afc973acfce8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CombinedTierOneAcres_f67e4eb6-e832-43c6-ae41-d5a596384045" xlink:href="fang-20210331.xsd#fang_CombinedTierOneAcres"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_fang_CombinedTierOneAcres_f67e4eb6-e832-43c6-ae41-d5a596384045" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_71f90216-9452-41cc-b917-ce85ad5662aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_71f90216-9452-41cc-b917-ce85ad5662aa" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves_9b073c27-48d4-4653-840b-413bc4a790f1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves_9b073c27-48d4-4653-840b-413bc4a790f1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsIncurredAcquisitionOfUnprovedOilAndGasProperties_6d89ddba-80a7-4ffd-9179-9dce7c9e02bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostsIncurredAcquisitionOfUnprovedOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_us-gaap_CostsIncurredAcquisitionOfUnprovedOilAndGasProperties_6d89ddba-80a7-4ffd-9179-9dce7c9e02bd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationProFormaInformationDirectOperatingExpensessinceAcquisitionDateActual_89b8fd23-c7f1-4184-8be4-f157b1ff12ea" xlink:href="fang-20210331.xsd#fang_BusinessCombinationProFormaInformationDirectOperatingExpensessinceAcquisitionDateActual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_fang_BusinessCombinationProFormaInformationDirectOperatingExpensessinceAcquisitionDateActual_89b8fd23-c7f1-4184-8be4-f157b1ff12ea" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare_9d487c68-98fb-4188-bcff-f9669bc4bcf5" xlink:href="fang-20210331.xsd#fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare_9d487c68-98fb-4188-bcff-f9669bc4bcf5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_6941f26d-d896-4480-9d16-824d996b4e55" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_6941f26d-d896-4480-9d16-824d996b4e55" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_97185f75-d8ac-45dc-928b-37d648184c27" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_97185f75-d8ac-45dc-928b-37d648184c27" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationAcquisitionRelatedCostsIncurredByAquiree_3f837be9-774e-4117-b499-8857ec70f477" xlink:href="fang-20210331.xsd#fang_BusinessCombinationAcquisitionRelatedCostsIncurredByAquiree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_fang_BusinessCombinationAcquisitionRelatedCostsIncurredByAquiree_3f837be9-774e-4117-b499-8857ec70f477" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d995a576-04f3-430e-82ef-08e77b90524f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ea1162ca-a4d7-4234-8370-9370792dc6db" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d995a576-04f3-430e-82ef-08e77b90524f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_5f02ad35-4606-40b2-9e33-57fc132676bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d995a576-04f3-430e-82ef-08e77b90524f" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_5f02ad35-4606-40b2-9e33-57fc132676bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5f02ad35-4606-40b2-9e33-57fc132676bf_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_5f02ad35-4606-40b2-9e33-57fc132676bf" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5f02ad35-4606-40b2-9e33-57fc132676bf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6aea2b53-c458-4283-be5f-cc0e5956a8e9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_5f02ad35-4606-40b2-9e33-57fc132676bf" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6aea2b53-c458-4283-be5f-cc0e5956a8e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCMember_bffb9cf3-e02e-42d6-bcbb-ca6343b1625b" xlink:href="fang-20210331.xsd#fang_GuidonOperatingLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6aea2b53-c458-4283-be5f-cc0e5956a8e9" xlink:to="loc_fang_GuidonOperatingLLCMember_bffb9cf3-e02e-42d6-bcbb-ca6343b1625b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_6f72870e-c95a-4f97-a502-51b5723f8266" xlink:href="fang-20210331.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6aea2b53-c458-4283-be5f-cc0e5956a8e9" xlink:to="loc_fang_QEPResourcesIncMember_6f72870e-c95a-4f97-a502-51b5723f8266" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_731f0561-c03d-4d67-8cae-66571d8a1aa3" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d995a576-04f3-430e-82ef-08e77b90524f" xlink:to="loc_srt_StatementGeographicalAxis_731f0561-c03d-4d67-8cae-66571d8a1aa3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_731f0561-c03d-4d67-8cae-66571d8a1aa3_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_731f0561-c03d-4d67-8cae-66571d8a1aa3" xlink:to="loc_srt_SegmentGeographicalDomain_731f0561-c03d-4d67-8cae-66571d8a1aa3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_4a5c82d6-ef3b-45ca-b96a-74d9af81cc2c" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_731f0561-c03d-4d67-8cae-66571d8a1aa3" xlink:to="loc_srt_SegmentGeographicalDomain_4a5c82d6-ef3b-45ca-b96a-74d9af81cc2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NorthernMidlandBasinMember_f73d8fbb-07e7-4deb-9316-13cb92389d95" xlink:href="fang-20210331.xsd#fang_NorthernMidlandBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_4a5c82d6-ef3b-45ca-b96a-74d9af81cc2c" xlink:to="loc_fang_NorthernMidlandBasinMember_f73d8fbb-07e7-4deb-9316-13cb92389d95" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSScheduleofAcquisitionConsiderationPaidDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#ACQUISITIONSScheduleofAcquisitionConsiderationPaidDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSScheduleofAcquisitionConsiderationPaidDetails" xlink:type="extended" id="id87217a35f0748428c0ea75e2c28db34_ACQUISITIONSScheduleofAcquisitionConsiderationPaidDetails">
    <link:loc xlink:type="locator" xlink:label="loc_fang_ScheduleOfAssetAcquisitionLineItems_cccedb4d-bfb9-4ae7-9d92-e5741f06770b" xlink:href="fang-20210331.xsd#fang_ScheduleOfAssetAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_86d6bd38-9ede-4487-84be-93fc262d3bfd" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_cccedb4d-bfb9-4ae7-9d92-e5741f06770b" xlink:to="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_86d6bd38-9ede-4487-84be-93fc262d3bfd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionSharePrice_790c71fe-65d3-4189-aed4-f49b83ed4299" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionSharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_cccedb4d-bfb9-4ae7-9d92-e5741f06770b" xlink:to="loc_fang_AssetAcquisitionSharePrice_790c71fe-65d3-4189-aed4-f49b83ed4299" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionFairValueCommonStockIssued_8c3a8950-e514-47a8-949b-81dbce1d340f" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionFairValueCommonStockIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_cccedb4d-bfb9-4ae7-9d92-e5741f06770b" xlink:to="loc_fang_AssetAcquisitionFairValueCommonStockIssued_8c3a8950-e514-47a8-949b-81dbce1d340f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_PaymentsForAssetAcquisitions_b4679707-6b0d-4f5b-94d9-feb049370471" xlink:href="fang-20210331.xsd#fang_PaymentsForAssetAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_cccedb4d-bfb9-4ae7-9d92-e5741f06770b" xlink:to="loc_fang_PaymentsForAssetAcquisitions_b4679707-6b0d-4f5b-94d9-feb049370471" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionConsiderationTransferred_4e0063ba-3669-4027-8e36-51257c3224c4" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_cccedb4d-bfb9-4ae7-9d92-e5741f06770b" xlink:to="loc_fang_AssetAcquisitionConsiderationTransferred_4e0063ba-3669-4027-8e36-51257c3224c4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionOilAndGasProperties_74202d20-2e7d-4883-9142-d812e9f417d5" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_cccedb4d-bfb9-4ae7-9d92-e5741f06770b" xlink:to="loc_fang_AssetAcquisitionOilAndGasProperties_74202d20-2e7d-4883-9142-d812e9f417d5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ScheduleOfAssetAcquisitionTable_b53b4d96-ade3-4d03-8412-f8d3fbcaae41" xlink:href="fang-20210331.xsd#fang_ScheduleOfAssetAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_cccedb4d-bfb9-4ae7-9d92-e5741f06770b" xlink:to="loc_fang_ScheduleOfAssetAcquisitionTable_b53b4d96-ade3-4d03-8412-f8d3fbcaae41" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_35021889-d1b3-4add-9b80-a08595b14ac7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_fang_ScheduleOfAssetAcquisitionTable_b53b4d96-ade3-4d03-8412-f8d3fbcaae41" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_35021889-d1b3-4add-9b80-a08595b14ac7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_35021889-d1b3-4add-9b80-a08595b14ac7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_35021889-d1b3-4add-9b80-a08595b14ac7" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_35021889-d1b3-4add-9b80-a08595b14ac7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cf08b79a-b0e4-41c4-9f3d-09b4fd78a9e7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_35021889-d1b3-4add-9b80-a08595b14ac7" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cf08b79a-b0e4-41c4-9f3d-09b4fd78a9e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCMember_0a294402-2027-4eb2-ae8a-bf740f465694" xlink:href="fang-20210331.xsd#fang_GuidonOperatingLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cf08b79a-b0e4-41c4-9f3d-09b4fd78a9e7" xlink:to="loc_fang_GuidonOperatingLLCMember_0a294402-2027-4eb2-ae8a-bf740f465694" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSScheduleofPurchasePriceAllocationDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#ACQUISITIONSScheduleofPurchasePriceAllocationDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSScheduleofPurchasePriceAllocationDetails" xlink:type="extended" id="i7517efb0d2ea473ab8b5127f399d69a7_ACQUISITIONSScheduleofPurchasePriceAllocationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_fang_ScheduleOfAssetAcquisitionLineItems_0fd2c38f-db89-4066-8c16-90a1f674fc9c" xlink:href="fang-20210331.xsd#fang_ScheduleOfAssetAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionConsiderationTransferred_8f8a9255-6e5e-4dc0-bb22-1f6de7bd3032" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_0fd2c38f-db89-4066-8c16-90a1f674fc9c" xlink:to="loc_fang_AssetAcquisitionConsiderationTransferred_8f8a9255-6e5e-4dc0-bb22-1f6de7bd3032" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionAssetRetirementObligation_a0ed2583-8ffd-4825-afba-6a12fe9452c7" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionAssetRetirementObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_0fd2c38f-db89-4066-8c16-90a1f674fc9c" xlink:to="loc_fang_AssetAcquisitionAssetRetirementObligation_a0ed2583-8ffd-4825-afba-6a12fe9452c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionOilAndGasProperties_9614c386-9455-4d5d-bde2-2c42fef20ed0" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_0fd2c38f-db89-4066-8c16-90a1f674fc9c" xlink:to="loc_fang_AssetAcquisitionOilAndGasProperties_9614c386-9455-4d5d-bde2-2c42fef20ed0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionMidstreamAssets_9a41bd7b-b933-4b63-9017-64e01571fe36" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionMidstreamAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_0fd2c38f-db89-4066-8c16-90a1f674fc9c" xlink:to="loc_fang_AssetAcquisitionMidstreamAssets_9a41bd7b-b933-4b63-9017-64e01571fe36" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionAssetsAcquired_a3f5ec57-0595-4c46-b2dd-415ffd6d9474" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionAssetsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_0fd2c38f-db89-4066-8c16-90a1f674fc9c" xlink:to="loc_fang_AssetAcquisitionAssetsAcquired_a3f5ec57-0595-4c46-b2dd-415ffd6d9474" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet_0a592454-857f-4822-baab-fa724b2e38d7" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_0fd2c38f-db89-4066-8c16-90a1f674fc9c" xlink:to="loc_fang_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet_0a592454-857f-4822-baab-fa724b2e38d7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ScheduleOfAssetAcquisitionTable_cabf94ca-0e8e-4d5b-a87a-c95ed8769910" xlink:href="fang-20210331.xsd#fang_ScheduleOfAssetAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_0fd2c38f-db89-4066-8c16-90a1f674fc9c" xlink:to="loc_fang_ScheduleOfAssetAcquisitionTable_cabf94ca-0e8e-4d5b-a87a-c95ed8769910" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_2d385d80-f6e0-4252-b79c-1f9ba8fb31e3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_fang_ScheduleOfAssetAcquisitionTable_cabf94ca-0e8e-4d5b-a87a-c95ed8769910" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_2d385d80-f6e0-4252-b79c-1f9ba8fb31e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2d385d80-f6e0-4252-b79c-1f9ba8fb31e3_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_2d385d80-f6e0-4252-b79c-1f9ba8fb31e3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2d385d80-f6e0-4252-b79c-1f9ba8fb31e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6846e66a-222e-4e84-bc4d-0104493babf4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_2d385d80-f6e0-4252-b79c-1f9ba8fb31e3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6846e66a-222e-4e84-bc4d-0104493babf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCMember_12376707-7e79-4cd3-887f-efc393111fcd" xlink:href="fang-20210331.xsd#fang_GuidonOperatingLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6846e66a-222e-4e84-bc4d-0104493babf4" xlink:to="loc_fang_GuidonOperatingLLCMember_12376707-7e79-4cd3-887f-efc393111fcd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSScheduleOfAcquisitionConsiderationPaidDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#ACQUISITIONSScheduleOfAcquisitionConsiderationPaidDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSScheduleOfAcquisitionConsiderationPaidDetails" xlink:type="extended" id="i0ce0937f04c54fbdb196be033c458ccc_ACQUISITIONSScheduleOfAcquisitionConsiderationPaidDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_37a00551-3534-42dd-a117-1f0f4b2e8a5d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesSharesEligibleToBeConverted_d45000d0-c530-482f-90e9-61c747a625c3" xlink:href="fang-20210331.xsd#fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesSharesEligibleToBeConverted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_37a00551-3534-42dd-a117-1f0f4b2e8a5d" xlink:to="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesSharesEligibleToBeConverted_d45000d0-c530-482f-90e9-61c747a625c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesPrecombinationConsideration_d363736f-e409-49da-aac8-c8cddeb14f47" xlink:href="fang-20210331.xsd#fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesPrecombinationConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_37a00551-3534-42dd-a117-1f0f4b2e8a5d" xlink:to="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesPrecombinationConsideration_d363736f-e409-49da-aac8-c8cddeb14f47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_6ea48bba-ddfd-47c3-96b9-636324038a82" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_37a00551-3534-42dd-a117-1f0f4b2e8a5d" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_6ea48bba-ddfd-47c3-96b9-636324038a82" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare_9f0c4d71-ecfa-46ee-8bda-5d8e15a5f40d" xlink:href="fang-20210331.xsd#fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_37a00551-3534-42dd-a117-1f0f4b2e8a5d" xlink:to="loc_fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare_9f0c4d71-ecfa-46ee-8bda-5d8e15a5f40d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesAdditionalShares_a56fd144-d449-4aa9-8b27-1aad0b073c73" xlink:href="fang-20210331.xsd#fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesAdditionalShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_37a00551-3534-42dd-a117-1f0f4b2e8a5d" xlink:to="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesAdditionalShares_a56fd144-d449-4aa9-8b27-1aad0b073c73" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionSharePrice_4705ce9a-66dc-484a-9bd3-6c47e3cc60bc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionSharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_37a00551-3534-42dd-a117-1f0f4b2e8a5d" xlink:to="loc_us-gaap_BusinessAcquisitionSharePrice_4705ce9a-66dc-484a-9bd3-6c47e3cc60bc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_83ce2885-8b6e-470d-a4d1-f38ffbfb3db9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_37a00551-3534-42dd-a117-1f0f4b2e8a5d" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_83ce2885-8b6e-470d-a4d1-f38ffbfb3db9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_092c0695-70c1-4d17-8798-fda8354d786a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_37a00551-3534-42dd-a117-1f0f4b2e8a5d" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_092c0695-70c1-4d17-8798-fda8354d786a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_491fc353-b1ec-4bb3-b5b2-c6cd6bf801ab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_092c0695-70c1-4d17-8798-fda8354d786a" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_491fc353-b1ec-4bb3-b5b2-c6cd6bf801ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_491fc353-b1ec-4bb3-b5b2-c6cd6bf801ab_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_491fc353-b1ec-4bb3-b5b2-c6cd6bf801ab" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_491fc353-b1ec-4bb3-b5b2-c6cd6bf801ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_35d6b3db-4163-4b54-a7cd-0de620942fe8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_491fc353-b1ec-4bb3-b5b2-c6cd6bf801ab" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_35d6b3db-4163-4b54-a7cd-0de620942fe8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_4bc9b8a8-3cc7-4e0c-a0c5-057ad40d3f20" xlink:href="fang-20210331.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_35d6b3db-4163-4b54-a7cd-0de620942fe8" xlink:to="loc_fang_QEPResourcesIncMember_4bc9b8a8-3cc7-4e0c-a0c5-057ad40d3f20" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSScheduleofPreliminaryPurchasePriceAllocationDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#ACQUISITIONSScheduleofPreliminaryPurchasePriceAllocationDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSScheduleofPreliminaryPurchasePriceAllocationDetails" xlink:type="extended" id="i4f69c43899c644ba9217fea2c2673ae8_ACQUISITIONSScheduleofPreliminaryPurchasePriceAllocationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_bd943c0f-a0a6-46ae-bd11-2714c73d913a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_fcc60816-02ac-4a69-b789-a651151a2018" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bd943c0f-a0a6-46ae-bd11-2714c73d913a" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_fcc60816-02ac-4a69-b789-a651151a2018" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_883d7d2d-3387-4688-8dfb-23b1b2dc8c0a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_fcc60816-02ac-4a69-b789-a651151a2018" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_883d7d2d-3387-4688-8dfb-23b1b2dc8c0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bd943c0f-a0a6-46ae-bd11-2714c73d913a" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_32b93bc3-4d3b-4be3-ad68-1d411a6f2fd2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_32b93bc3-4d3b-4be3-ad68-1d411a6f2fd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedCapitalExpenditures_7c46c3ce-8ca3-448e-b28a-2f01bda44fc8" xlink:href="fang-20210331.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedCapitalExpenditures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedCapitalExpenditures_7c46c3ce-8ca3-448e-b28a-2f01bda44fc8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOtherAccruedLiabilities_ff86d7a2-743b-4fbc-97b9-b784f31a1758" xlink:href="fang-20210331.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOtherAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOtherAccruedLiabilities_ff86d7a2-743b-4fbc-97b9-b784f31a1758" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesContractWithCustomer_49ecda11-1477-4a49-b1da-d39cca3c503a" xlink:href="fang-20210331.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesContractWithCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesContractWithCustomer_49ecda11-1477-4a49-b1da-d39cca3c503a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedNoncurrentDerivativeInstrumentLiabilities_f5148127-2c59-4f6d-963c-5b44633e71cc" xlink:href="fang-20210331.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedNoncurrentDerivativeInstrumentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedNoncurrentDerivativeInstrumentLiabilities_f5148127-2c59-4f6d-963c-5b44633e71cc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt_a0024c97-0b89-4e27-8909-0d184b8c0850" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt_a0024c97-0b89-4e27-8909-0d184b8c0850" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetRetirementObligation_b79be6fb-cd92-44e5-8648-a46654a59de2" xlink:href="fang-20210331.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetRetirementObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetRetirementObligation_b79be6fb-cd92-44e5-8648-a46654a59de2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_bb4f62b0-8a4b-4e16-96b2-6641eeb30a2d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_bb4f62b0-8a4b-4e16-96b2-6641eeb30a2d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_2debf970-e174-4a2d-8b65-6cdb47fe521d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_a407f31e-c597-4cc0-bfaf-13b1f5ab4893" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_2debf970-e174-4a2d-8b65-6cdb47fe521d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bd943c0f-a0a6-46ae-bd11-2714c73d913a" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_037d3792-fb78-41ac-bdb7-46eb6b708740" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_037d3792-fb78-41ac-bdb7-46eb6b708740" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOilAndGasJointInterestBillingReceivablesCurrent_5580d222-a049-4179-ab3c-92416bcdd5a3" xlink:href="fang-20210331.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOilAndGasJointInterestBillingReceivablesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOilAndGasJointInterestBillingReceivablesCurrent_5580d222-a049-4179-ab3c-92416bcdd5a3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_110fda44-abf5-48e5-9342-b3451e6b8aca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_110fda44-abf5-48e5-9342-b3451e6b8aca" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_71b08199-afec-4483-8787-b9cc514d8275" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_71b08199-afec-4483-8787-b9cc514d8275" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsIncomeTaxesReceivableCurrent_e3c2b7b0-da12-46e9-a490-a18051ae3826" xlink:href="fang-20210331.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsIncomeTaxesReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsIncomeTaxesReceivableCurrent_e3c2b7b0-da12-46e9-a490-a18051ae3826" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_b24852d6-5f99-4508-af24-4bb6353b7864" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_b24852d6-5f99-4508-af24-4bb6353b7864" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOilAndGasProperties_f87c1a6d-e92c-46c0-bb7f-99dd72bcb025" xlink:href="fang-20210331.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOilAndGasProperties_f87c1a6d-e92c-46c0-bb7f-99dd72bcb025" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherPropertyPlantAndEquipment_090f478c-b0ce-493e-8cb4-cb7833b8247d" xlink:href="fang-20210331.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherPropertyPlantAndEquipment_090f478c-b0ce-493e-8cb4-cb7833b8247d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_a728349a-1718-4aab-9ce9-9c3a74f23680" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_a728349a-1718-4aab-9ce9-9c3a74f23680" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_2a981381-5975-4f8e-8d9e-5c68ccf3aa25" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_2a981381-5975-4f8e-8d9e-5c68ccf3aa25" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_c7c715d2-6b8d-427e-86ba-9d2ee3bc0be6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_81a037dc-d8f9-4129-a083-3a682d02273e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_c7c715d2-6b8d-427e-86ba-9d2ee3bc0be6" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_72f02e7e-0617-4873-8211-3bd9e6123996" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bd943c0f-a0a6-46ae-bd11-2714c73d913a" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_72f02e7e-0617-4873-8211-3bd9e6123996" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1839312b-076e-4808-9a3d-75bff6f525ad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bd943c0f-a0a6-46ae-bd11-2714c73d913a" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1839312b-076e-4808-9a3d-75bff6f525ad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_8563afc0-a559-4ded-bc3e-fae30b0ec812" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_1839312b-076e-4808-9a3d-75bff6f525ad" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_8563afc0-a559-4ded-bc3e-fae30b0ec812" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8563afc0-a559-4ded-bc3e-fae30b0ec812_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_8563afc0-a559-4ded-bc3e-fae30b0ec812" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8563afc0-a559-4ded-bc3e-fae30b0ec812_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ed161013-3c65-4e53-8fb9-a9bbd7f0b68b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_8563afc0-a559-4ded-bc3e-fae30b0ec812" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ed161013-3c65-4e53-8fb9-a9bbd7f0b68b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_085c4ae4-f7a6-4786-81c9-94894857b7a2" xlink:href="fang-20210331.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ed161013-3c65-4e53-8fb9-a9bbd7f0b68b" xlink:to="loc_fang_QEPResourcesIncMember_085c4ae4-f7a6-4786-81c9-94894857b7a2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSBusinessAcquisitionProFormaInformationDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#ACQUISITIONSBusinessAcquisitionProFormaInformationDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSBusinessAcquisitionProFormaInformationDetails" xlink:type="extended" id="i1309cb7736874c00a020b367aff21219_ACQUISITIONSBusinessAcquisitionProFormaInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_ec8f94ce-aea7-4b5d-b7c0-a47e42fa8fa1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_c112bfd9-bf6c-4c69-b086-9462a871205c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ec8f94ce-aea7-4b5d-b7c0-a47e42fa8fa1" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_c112bfd9-bf6c-4c69-b086-9462a871205c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_Proformaincomelossfromoperations_ee1b7243-79e8-45a1-9be3-a7b55799d200" xlink:href="fang-20210331.xsd#fang_Proformaincomelossfromoperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ec8f94ce-aea7-4b5d-b7c0-a47e42fa8fa1" xlink:to="loc_fang_Proformaincomelossfromoperations_ee1b7243-79e8-45a1-9be3-a7b55799d200" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_488bc710-39e3-4ec2-8101-2b0a44d45feb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ec8f94ce-aea7-4b5d-b7c0-a47e42fa8fa1" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_488bc710-39e3-4ec2-8101-2b0a44d45feb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_1c326468-7479-4278-850b-f7c5fb2c9f7b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ec8f94ce-aea7-4b5d-b7c0-a47e42fa8fa1" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_1c326468-7479-4278-850b-f7c5fb2c9f7b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_7db8628c-2198-4be1-ae1f-bfc552f1f7a7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ec8f94ce-aea7-4b5d-b7c0-a47e42fa8fa1" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_7db8628c-2198-4be1-ae1f-bfc552f1f7a7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_7e8ced44-9402-44fa-ab35-c3ee2029ff4b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_ec8f94ce-aea7-4b5d-b7c0-a47e42fa8fa1" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_7e8ced44-9402-44fa-ab35-c3ee2029ff4b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_3160294e-37f9-454c-87cb-36a41a6cd789" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_7e8ced44-9402-44fa-ab35-c3ee2029ff4b" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_3160294e-37f9-454c-87cb-36a41a6cd789" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3160294e-37f9-454c-87cb-36a41a6cd789_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_3160294e-37f9-454c-87cb-36a41a6cd789" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3160294e-37f9-454c-87cb-36a41a6cd789_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e74cc993-4569-45c7-8e4a-b156bcb26ec2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_3160294e-37f9-454c-87cb-36a41a6cd789" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e74cc993-4569-45c7-8e4a-b156bcb26ec2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_48c43d23-2d43-47fb-8331-16784edb0c04" xlink:href="fang-20210331.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e74cc993-4569-45c7-8e4a-b156bcb26ec2" xlink:to="loc_fang_QEPResourcesIncMember_48c43d23-2d43-47fb-8331-16784edb0c04" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/REALESTATEASSETS" xlink:type="simple" xlink:href="fang-20210331.xsd#REALESTATEASSETS"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/REALESTATEASSETS" xlink:type="extended" id="i80392543ebc743bd97654c55237b9ff0_REALESTATEASSETS"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/REALESTATEASSETSTables" xlink:type="simple" xlink:href="fang-20210331.xsd#REALESTATEASSETSTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/REALESTATEASSETSTables" xlink:type="extended" id="i200b59bf677c4d07a78e10e4a2db62b3_REALESTATEASSETSTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/REALESTATEASSETSDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#REALESTATEASSETSDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/REALESTATEASSETSDetails" xlink:type="extended" id="i3970a9ef7e4043af861fe272de85edd1_REALESTATEASSETSDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateLineItems_e5d052ad-991e-465d-95be-ebde01e7e3fb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RealEstateLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_f9f7d215-a620-465a-87c0-e67229df4695" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstateLineItems_e5d052ad-991e-465d-95be-ebde01e7e3fb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_f9f7d215-a620-465a-87c0-e67229df4695" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingsAndImprovementsGross_b2ff06b5-2862-4055-b624-46180864eea8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BuildingsAndImprovementsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstateLineItems_e5d052ad-991e-465d-95be-ebde01e7e3fb" xlink:to="loc_us-gaap_BuildingsAndImprovementsGross_b2ff06b5-2862-4055-b624-46180864eea8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TenantImprovements_c40aa498-e073-4c90-a589-c567527d3d27" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TenantImprovements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstateLineItems_e5d052ad-991e-465d-95be-ebde01e7e3fb" xlink:to="loc_us-gaap_TenantImprovements_c40aa498-e073-4c90-a589-c567527d3d27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Land_f7ba5b4f-d24a-4339-bc12-0f2fa653e3c8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Land"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstateLineItems_e5d052ad-991e-465d-95be-ebde01e7e3fb" xlink:to="loc_us-gaap_Land_f7ba5b4f-d24a-4339-bc12-0f2fa653e3c8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandImprovements_b3430b45-0849-44ce-b6ed-cd51067654ef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LandImprovements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstateLineItems_e5d052ad-991e-465d-95be-ebde01e7e3fb" xlink:to="loc_us-gaap_LandImprovements_b3430b45-0849-44ce-b6ed-cd51067654ef" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAtCost_06f71a5c-f700-4bbd-919c-7ec76bc4f884" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RealEstateInvestmentPropertyAtCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstateLineItems_e5d052ad-991e-465d-95be-ebde01e7e3fb" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAtCost_06f71a5c-f700-4bbd-919c-7ec76bc4f884" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateOwnedAccumulatedDepreciation_4511aefe-975a-4158-a362-98b311d3209d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RealEstateOwnedAccumulatedDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstateLineItems_e5d052ad-991e-465d-95be-ebde01e7e3fb" xlink:to="loc_us-gaap_RealEstateOwnedAccumulatedDepreciation_4511aefe-975a-4158-a362-98b311d3209d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_0cc6e486-7fb9-47d5-8555-ee01ed59f4fc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RealEstateInvestmentPropertyNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstateLineItems_e5d052ad-991e-465d-95be-ebde01e7e3fb" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyNet_0cc6e486-7fb9-47d5-8555-ee01ed59f4fc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateTable_35793932-74ef-4431-a139-f6947c7916fc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RealEstateTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RealEstateLineItems_e5d052ad-991e-465d-95be-ebde01e7e3fb" xlink:to="loc_us-gaap_RealEstateTable_35793932-74ef-4431-a139-f6947c7916fc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_540ad6ae-95d6-4d6d-8ad5-707d62d59195" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RealEstateTable_35793932-74ef-4431-a139-f6947c7916fc" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_540ad6ae-95d6-4d6d-8ad5-707d62d59195" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_540ad6ae-95d6-4d6d-8ad5-707d62d59195_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_540ad6ae-95d6-4d6d-8ad5-707d62d59195" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_540ad6ae-95d6-4d6d-8ad5-707d62d59195_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_839fb4ca-cc9e-4538-a8fd-56a6d7caedaa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_540ad6ae-95d6-4d6d-8ad5-707d62d59195" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_839fb4ca-cc9e-4538-a8fd-56a6d7caedaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_b92923b9-c450-4b97-a6e0-3581e0e4a207" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_839fb4ca-cc9e-4538-a8fd-56a6d7caedaa" xlink:to="loc_us-gaap_BuildingMember_b92923b9-c450-4b97-a6e0-3581e0e4a207" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_f513cd75-90ca-4ef1-8990-5f52a513113b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_839fb4ca-cc9e-4538-a8fd-56a6d7caedaa" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_f513cd75-90ca-4ef1-8990-5f52a513113b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandImprovementsMember_e84bc4f3-80a4-4d21-97d4-c405e56885c6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LandImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_839fb4ca-cc9e-4538-a8fd-56a6d7caedaa" xlink:to="loc_us-gaap_LandImprovementsMember_e84bc4f3-80a4-4d21-97d4-c405e56885c6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_18bf7b68-6ac6-4791-a60e-8dec92aeb92d" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RealEstateTable_35793932-74ef-4431-a139-f6947c7916fc" xlink:to="loc_srt_RangeAxis_18bf7b68-6ac6-4791-a60e-8dec92aeb92d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_18bf7b68-6ac6-4791-a60e-8dec92aeb92d_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_18bf7b68-6ac6-4791-a60e-8dec92aeb92d" xlink:to="loc_srt_RangeMember_18bf7b68-6ac6-4791-a60e-8dec92aeb92d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_bd79c902-ceda-44ea-a47b-c694ca3ce322" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_18bf7b68-6ac6-4791-a60e-8dec92aeb92d" xlink:to="loc_srt_RangeMember_bd79c902-ceda-44ea-a47b-c694ca3ce322" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_3bd69375-2ce2-46dd-b470-0b086509ff60" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_bd79c902-ceda-44ea-a47b-c694ca3ce322" xlink:to="loc_srt_MinimumMember_3bd69375-2ce2-46dd-b470-0b086509ff60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_54201f57-2582-4eec-bdff-2a74db9ddbaf" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_bd79c902-ceda-44ea-a47b-c694ca3ce322" xlink:to="loc_srt_MaximumMember_54201f57-2582-4eec-bdff-2a74db9ddbaf" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENT" xlink:type="simple" xlink:href="fang-20210331.xsd#PROPERTYANDEQUIPMENT"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENT" xlink:type="extended" id="i37b864b2f1754ee9a7b212f6e6d0f0d7_PROPERTYANDEQUIPMENT"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENTTables" xlink:type="simple" xlink:href="fang-20210331.xsd#PROPERTYANDEQUIPMENTTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENTTables" xlink:type="extended" id="i47c927f1eabd40b28f6686bed1700c8e_PROPERTYANDEQUIPMENTTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENTDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#PROPERTYANDEQUIPMENTDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENTDetails" xlink:type="extended" id="i6be75f90529c44c696e5862c1ef10ff9_PROPERTYANDEQUIPMENTDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_ce8772dd-0ef7-4745-a469-744b48050657" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OilAndGasPropertyAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_ce8772dd-0ef7-4745-a469-744b48050657" xlink:to="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedCostsProvedProperties_172ea7e5-cc68-48c4-a514-22db1ee4c6b2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalizedCostsProvedProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:to="loc_us-gaap_CapitalizedCostsProvedProperties_172ea7e5-cc68-48c4-a514-22db1ee4c6b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative_99110b6f-8d98-439b-bf18-f87ee3aae88c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:to="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative_99110b6f-8d98-439b-bf18-f87ee3aae88c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OilAndGasPropertyFullCostMethodGross_e140a1fe-85f4-476f-8919-de54e5984659" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OilAndGasPropertyFullCostMethodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:to="loc_us-gaap_OilAndGasPropertyFullCostMethodGross_e140a1fe-85f4-476f-8919-de54e5984659" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_cb961d90-4b1a-478a-9d54-b88c1f089174" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_cb961d90-4b1a-478a-9d54-b88c1f089174" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CapitalizedCostsAccumulatedImpairment_4b7b1e22-e0c1-46cf-8ad8-f8161c8209ac" xlink:href="fang-20210331.xsd#fang_CapitalizedCostsAccumulatedImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:to="loc_fang_CapitalizedCostsAccumulatedImpairment_4b7b1e22-e0c1-46cf-8ad8-f8161c8209ac" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet_e2fa56a0-7fc1-4ece-b73b-abe82fb76b04" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:to="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet_e2fa56a0-7fc1-4ece-b73b-abe82fb76b04" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_PipelineandGasGatheringAssets_488ac2ef-7e1d-4050-aead-2ef34b2e87ff" xlink:href="fang-20210331.xsd#fang_PipelineandGasGatheringAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:to="loc_fang_PipelineandGasGatheringAssets_488ac2ef-7e1d-4050-aead-2ef34b2e87ff" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentOther_3fb421b3-97e7-46b4-bab2-c36e5040090f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentOther_3fb421b3-97e7-46b4-bab2-c36e5040090f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_7d627525-f768-4c33-be78-1584760ed19a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_265e9df5-063f-4e10-b1ca-13379e5b9b15" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_7d627525-f768-4c33-be78-1584760ed19a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c7b12878-a834-442c-b953-adfc69bdfd95" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_ce8772dd-0ef7-4745-a469-744b48050657" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c7b12878-a834-442c-b953-adfc69bdfd95" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_aadf8313-c4a7-492c-ac50-bae6f1d54b6c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c7b12878-a834-442c-b953-adfc69bdfd95" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_aadf8313-c4a7-492c-ac50-bae6f1d54b6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aadf8313-c4a7-492c-ac50-bae6f1d54b6c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_aadf8313-c4a7-492c-ac50-bae6f1d54b6c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aadf8313-c4a7-492c-ac50-bae6f1d54b6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e867a9c7-c8c7-48c2-881e-9b043e5b98a0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_aadf8313-c4a7-492c-ac50-bae6f1d54b6c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e867a9c7-c8c7-48c2-881e-9b043e5b98a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OilAndGasPropertiesMember_0ff19219-66e2-437e-bc05-9dd2940fa320" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OilAndGasPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e867a9c7-c8c7-48c2-881e-9b043e5b98a0" xlink:to="loc_us-gaap_OilAndGasPropertiesMember_0ff19219-66e2-437e-bc05-9dd2940fa320" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_e8e344b6-616c-454b-8315-928fd0735f47" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentOtherTypesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e867a9c7-c8c7-48c2-881e-9b043e5b98a0" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_e8e344b6-616c-454b-8315-928fd0735f47" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENTNarrativeDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#PROPERTYANDEQUIPMENTNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENTNarrativeDetails" xlink:type="extended" id="i7fc425df85154ec0826ea96bc7691f1a_PROPERTYANDEQUIPMENTNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_a9ff0b5f-016a-4848-a426-e3989f4fe4bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfOilAndGasProperties_a577f0a8-d954-45c1-9466-ef2366b921ee" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOfOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a9ff0b5f-016a-4848-a426-e3989f4fe4bf" xlink:to="loc_us-gaap_ImpairmentOfOilAndGasProperties_a577f0a8-d954-45c1-9466-ef2366b921ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OilAndGasProducingPropertiesOfRateRegulatedCompaniesUnamortizedCost_bffb7e8d-2c29-41d4-90cd-c904d1d334e1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OilAndGasProducingPropertiesOfRateRegulatedCompaniesUnamortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a9ff0b5f-016a-4848-a426-e3989f4fe4bf" xlink:to="loc_us-gaap_OilAndGasProducingPropertiesOfRateRegulatedCompaniesUnamortizedCost_bffb7e8d-2c29-41d4-90cd-c904d1d334e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ImpairmentOfOilAndGasPropertiesWithoutWaiver_8596e744-9098-457e-b5c3-f014d650a479" xlink:href="fang-20210331.xsd#fang_ImpairmentOfOilAndGasPropertiesWithoutWaiver"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a9ff0b5f-016a-4848-a426-e3989f4fe4bf" xlink:to="loc_fang_ImpairmentOfOilAndGasPropertiesWithoutWaiver_8596e744-9098-457e-b5c3-f014d650a479" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ad9d3feb-ce74-4cce-8988-d628fe5f0a84" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a9ff0b5f-016a-4848-a426-e3989f4fe4bf" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ad9d3feb-ce74-4cce-8988-d628fe5f0a84" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_1fce7e7b-c4d1-4a71-9d88-309b6e7a8382" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ad9d3feb-ce74-4cce-8988-d628fe5f0a84" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_1fce7e7b-c4d1-4a71-9d88-309b6e7a8382" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1fce7e7b-c4d1-4a71-9d88-309b6e7a8382_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1fce7e7b-c4d1-4a71-9d88-309b6e7a8382" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1fce7e7b-c4d1-4a71-9d88-309b6e7a8382_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_fb47d51b-71e5-43aa-858d-de5ea2346187" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1fce7e7b-c4d1-4a71-9d88-309b6e7a8382" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_fb47d51b-71e5-43aa-858d-de5ea2346187" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCAndQEPResourcesMember_cfa9693f-ae70-4ca2-8d29-137651c42c6c" xlink:href="fang-20210331.xsd#fang_GuidonOperatingLLCAndQEPResourcesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_fb47d51b-71e5-43aa-858d-de5ea2346187" xlink:to="loc_fang_GuidonOperatingLLCAndQEPResourcesMember_cfa9693f-ae70-4ca2-8d29-137651c42c6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_c7401daa-ca7f-4958-874d-4ddcf7c8860c" xlink:href="fang-20210331.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_GuidonOperatingLLCAndQEPResourcesMember_cfa9693f-ae70-4ca2-8d29-137651c42c6c" xlink:to="loc_fang_QEPResourcesIncMember_c7401daa-ca7f-4958-874d-4ddcf7c8860c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCMember_d23dc51d-ad96-45ac-9eaa-8a4672d39d71" xlink:href="fang-20210331.xsd#fang_GuidonOperatingLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_GuidonOperatingLLCAndQEPResourcesMember_cfa9693f-ae70-4ca2-8d29-137651c42c6c" xlink:to="loc_fang_GuidonOperatingLLCMember_d23dc51d-ad96-45ac-9eaa-8a4672d39d71" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ASSETRETIREMENTOBLIGATIONS" xlink:type="simple" xlink:href="fang-20210331.xsd#ASSETRETIREMENTOBLIGATIONS"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ASSETRETIREMENTOBLIGATIONS" xlink:type="extended" id="ia67a07978d044f6a8fe6c2d8d539c120_ASSETRETIREMENTOBLIGATIONS"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ASSETRETIREMENTOBLIGATIONSTables" xlink:type="simple" xlink:href="fang-20210331.xsd#ASSETRETIREMENTOBLIGATIONSTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ASSETRETIREMENTOBLIGATIONSTables" xlink:type="extended" id="i37c90d1d900044f0af67c92708cd7876_ASSETRETIREMENTOBLIGATIONSTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ASSETRETIREMENTOBLIGATIONSDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#ASSETRETIREMENTOBLIGATIONSDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ASSETRETIREMENTOBLIGATIONSDetails" xlink:type="extended" id="i2d2590aef7af409d9e9cae332c3d51ab_ASSETRETIREMENTOBLIGATIONSDetails"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYMETHODINVESTMENTS" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYMETHODINVESTMENTS"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYMETHODINVESTMENTS" xlink:type="extended" id="i45e436cc55c14d15a418b98eb2c1e01b_EQUITYMETHODINVESTMENTS"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYMETHODINVESTMENTSTables" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYMETHODINVESTMENTSTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYMETHODINVESTMENTSTables" xlink:type="extended" id="ic6440c29c29a42e3b69faa1fac96a6cf_EQUITYMETHODINVESTMENTSTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYMETHODINVESTMENTSCarryingValuesofRattlersEquityMethodInvestmentsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYMETHODINVESTMENTSCarryingValuesofRattlersEquityMethodInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYMETHODINVESTMENTSCarryingValuesofRattlersEquityMethodInvestmentsDetails" xlink:type="extended" id="i936b0359aba9447397cf95208b4693c5_EQUITYMETHODINVESTMENTSCarryingValuesofRattlersEquityMethodInvestmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1ab52eb7-dac1-4cbe-91e9-bb0ba2d72f55" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_f4f02c55-9b07-4be0-a14b-0ae575b4c0a2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1ab52eb7-dac1-4cbe-91e9-bb0ba2d72f55" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_f4f02c55-9b07-4be0-a14b-0ae575b4c0a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_427c2691-3a24-499a-9c35-e1114441fcf7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1ab52eb7-dac1-4cbe-91e9-bb0ba2d72f55" xlink:to="loc_us-gaap_EquityMethodInvestments_427c2691-3a24-499a-9c35-e1114441fcf7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_870b76fb-0309-4aa4-9c43-645709d63d58" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_1ab52eb7-dac1-4cbe-91e9-bb0ba2d72f55" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_870b76fb-0309-4aa4-9c43-645709d63d58" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_3c75d809-fe32-4ae2-b9f3-8055e0c1fcf3" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_870b76fb-0309-4aa4-9c43-645709d63d58" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_3c75d809-fe32-4ae2-b9f3-8055e0c1fcf3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_3c75d809-fe32-4ae2-b9f3-8055e0c1fcf3_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_3c75d809-fe32-4ae2-b9f3-8055e0c1fcf3" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_3c75d809-fe32-4ae2-b9f3-8055e0c1fcf3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_9001566a-c634-4cbc-ad26-6e746a9e4284" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_3c75d809-fe32-4ae2-b9f3-8055e0c1fcf3" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_9001566a-c634-4cbc-ad26-6e746a9e4284" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EpicPipelineMember_c492e4b4-05c9-410d-b904-ac6d9cb22033" xlink:href="fang-20210331.xsd#fang_EpicPipelineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_9001566a-c634-4cbc-ad26-6e746a9e4284" xlink:to="loc_fang_EpicPipelineMember_c492e4b4-05c9-410d-b904-ac6d9cb22033" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GrayOakPipelineMember_900e2a88-1c7f-434c-9751-a7c1b78205e2" xlink:href="fang-20210331.xsd#fang_GrayOakPipelineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_9001566a-c634-4cbc-ad26-6e746a9e4284" xlink:to="loc_fang_GrayOakPipelineMember_900e2a88-1c7f-434c-9751-a7c1b78205e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WinkToWebsterPipelineMember_e2efbeb5-81c4-4c36-bed4-2dc01cdceee5" xlink:href="fang-20210331.xsd#fang_WinkToWebsterPipelineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_9001566a-c634-4cbc-ad26-6e746a9e4284" xlink:to="loc_fang_WinkToWebsterPipelineMember_e2efbeb5-81c4-4c36-bed4-2dc01cdceee5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_OMOGJVLLCMember_5fa99bde-b2be-49aa-84f5-52d3826f14e2" xlink:href="fang-20210331.xsd#fang_OMOGJVLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_9001566a-c634-4cbc-ad26-6e746a9e4284" xlink:to="loc_fang_OMOGJVLLCMember_5fa99bde-b2be-49aa-84f5-52d3826f14e2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AmarilloRattlerLLCMember_c0cabe52-f801-4c34-90f1-f3a110e6a7e0" xlink:href="fang-20210331.xsd#fang_AmarilloRattlerLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_9001566a-c634-4cbc-ad26-6e746a9e4284" xlink:to="loc_fang_AmarilloRattlerLLCMember_c0cabe52-f801-4c34-90f1-f3a110e6a7e0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_29628aa1-d1c7-4ab2-9f59-29c35023b9fd" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_870b76fb-0309-4aa4-9c43-645709d63d58" xlink:to="loc_dei_LegalEntityAxis_29628aa1-d1c7-4ab2-9f59-29c35023b9fd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_29628aa1-d1c7-4ab2-9f59-29c35023b9fd_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_29628aa1-d1c7-4ab2-9f59-29c35023b9fd" xlink:to="loc_dei_EntityDomain_29628aa1-d1c7-4ab2-9f59-29c35023b9fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d4d7eec3-809b-4341-9c84-f06c58e97171" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_29628aa1-d1c7-4ab2-9f59-29c35023b9fd" xlink:to="loc_dei_EntityDomain_d4d7eec3-809b-4341-9c84-f06c58e97171" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerLLCMember_55bac796-6257-4d85-8562-01e4fa4b64bf" xlink:href="fang-20210331.xsd#fang_RattlerLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_d4d7eec3-809b-4341-9c84-f06c58e97171" xlink:to="loc_fang_RattlerLLCMember_55bac796-6257-4d85-8562-01e4fa4b64bf" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYMETHODINVESTMENTSNarrativeDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYMETHODINVESTMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYMETHODINVESTMENTSNarrativeDetails" xlink:type="extended" id="i5cfdba1a85664e92a7c8e0c200d968bb_EQUITYMETHODINVESTMENTSNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_a2027efb-d147-4b5e-9616-27ec3c7d6df3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_02bfa023-cd71-4149-a77c-5cf2accd28ec" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_a2027efb-d147-4b5e-9616-27ec3c7d6df3" xlink:to="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_02bfa023-cd71-4149-a77c-5cf2accd28ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_c8610ac0-b4d6-4760-9310-1253c5d50a5b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_a2027efb-d147-4b5e-9616-27ec3c7d6df3" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_c8610ac0-b4d6-4760-9310-1253c5d50a5b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_6051e98b-bbfa-4a86-a08d-7dfef6403bde" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_c8610ac0-b4d6-4760-9310-1253c5d50a5b" xlink:to="loc_dei_LegalEntityAxis_6051e98b-bbfa-4a86-a08d-7dfef6403bde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6051e98b-bbfa-4a86-a08d-7dfef6403bde_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_6051e98b-bbfa-4a86-a08d-7dfef6403bde" xlink:to="loc_dei_EntityDomain_6051e98b-bbfa-4a86-a08d-7dfef6403bde_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6b609f90-adbd-4608-a671-3c8dd7e3f4ec" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_6051e98b-bbfa-4a86-a08d-7dfef6403bde" xlink:to="loc_dei_EntityDomain_6b609f90-adbd-4608-a671-3c8dd7e3f4ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerLLCMember_79f53e22-1f1b-4fe3-ba53-e55a263d448f" xlink:href="fang-20210331.xsd#fang_RattlerLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6b609f90-adbd-4608-a671-3c8dd7e3f4ec" xlink:to="loc_fang_RattlerLLCMember_79f53e22-1f1b-4fe3-ba53-e55a263d448f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBT" xlink:type="simple" xlink:href="fang-20210331.xsd#DEBT"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBT" xlink:type="extended" id="ie855176dde8346f6aa856ffde7c05aa3_DEBT"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTTables" xlink:type="simple" xlink:href="fang-20210331.xsd#DEBTTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTTables" xlink:type="extended" id="id39ebc84646c4670893c4650b7b37ed0_DEBTTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTLongtermDebtDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#DEBTLongtermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTLongtermDebtDetails" xlink:type="extended" id="ibba992ccd06c4061978eb90a0acd4747_DEBTLongtermDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_69e0a798-66dc-459a-8b13-5320d485e26f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_82510921-d552-4307-ac48-9e02f883c2cd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_69e0a798-66dc-459a-8b13-5320d485e26f" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_82510921-d552-4307-ac48-9e02f883c2cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_bceb3df5-ffb6-4da3-8b5e-43611bf7e444" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_69e0a798-66dc-459a-8b13-5320d485e26f" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_bceb3df5-ffb6-4da3-8b5e-43611bf7e444" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_782bada0-65eb-44b0-9f92-0052e604cada" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_69e0a798-66dc-459a-8b13-5320d485e26f" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_782bada0-65eb-44b0-9f92-0052e604cada" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedPremium_271abc1a-fe29-44a9-a1e4-c9f493f0aa07" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentUnamortizedPremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_69e0a798-66dc-459a-8b13-5320d485e26f" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedPremium_271abc1a-fe29-44a9-a1e4-c9f493f0aa07" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_40ae6f0a-477b-428e-b468-faf60338b0b6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_69e0a798-66dc-459a-8b13-5320d485e26f" xlink:to="loc_us-gaap_LongTermDebtCurrent_40ae6f0a-477b-428e-b468-faf60338b0b6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_a8ad9517-7f81-436d-a33b-186eb63a48f7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_69e0a798-66dc-459a-8b13-5320d485e26f" xlink:to="loc_us-gaap_LongTermDebt_a8ad9517-7f81-436d-a33b-186eb63a48f7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_f35c2d50-694c-440a-8b0a-9e24f6703aef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_69e0a798-66dc-459a-8b13-5320d485e26f" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_f35c2d50-694c-440a-8b0a-9e24f6703aef" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_2ba21cfa-b361-45d5-9b76-c76037e6ccd9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_69e0a798-66dc-459a-8b13-5320d485e26f" xlink:to="loc_us-gaap_DebtInstrumentTable_2ba21cfa-b361-45d5-9b76-c76037e6ccd9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_f204afe0-12de-4b0f-bac8-3591ee4eba27" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2ba21cfa-b361-45d5-9b76-c76037e6ccd9" xlink:to="loc_us-gaap_DebtInstrumentAxis_f204afe0-12de-4b0f-bac8-3591ee4eba27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_f204afe0-12de-4b0f-bac8-3591ee4eba27_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_f204afe0-12de-4b0f-bac8-3591ee4eba27" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_f204afe0-12de-4b0f-bac8-3591ee4eba27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_f204afe0-12de-4b0f-bac8-3591ee4eba27" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4.625Notesdue2021Member_dacb5524-4a35-4e96-befd-8596b4de3740" xlink:href="fang-20210331.xsd#fang_A4.625Notesdue2021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A4.625Notesdue2021Member_dacb5524-4a35-4e96-befd-8596b4de3740" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5375SeniorNotesDue2022Member_2cea862b-5c0b-4c81-b2a5-cb5236f9dd53" xlink:href="fang-20210331.xsd#fang_A5375SeniorNotesDue2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A5375SeniorNotesDue2022Member_2cea862b-5c0b-4c81-b2a5-cb5236f9dd53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A7.32MediumTermSeriesAdue2022Member_0bbb2198-14f7-4be7-917c-3d5b33e73f5d" xlink:href="fang-20210331.xsd#fang_A7.32MediumTermSeriesAdue2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A7.32MediumTermSeriesAdue2022Member_0bbb2198-14f7-4be7-917c-3d5b33e73f5d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A0900SeniorNotesDue2023Member_7936a138-0ef9-43d9-a1fd-54413cf2fd09" xlink:href="fang-20210331.xsd#fang_A0900SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A0900SeniorNotesDue2023Member_7936a138-0ef9-43d9-a1fd-54413cf2fd09" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5250SeniorNotesDue2023Member_5498d404-0afb-4f3f-8890-678c70003bdf" xlink:href="fang-20210331.xsd#fang_A5250SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A5250SeniorNotesDue2023Member_5498d404-0afb-4f3f-8890-678c70003bdf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A2.875SeniorNotesdue2024Member_769cb5e4-695e-41c9-8b76-4b40dae254ab" xlink:href="fang-20210331.xsd#fang_A2.875SeniorNotesdue2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A2.875SeniorNotesdue2024Member_769cb5e4-695e-41c9-8b76-4b40dae254ab" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4750SeniorNotesDue2025Member_ffdfc9ff-87f5-44d3-9214-78d59f84a3f8" xlink:href="fang-20210331.xsd#fang_A4750SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A4750SeniorNotesDue2025Member_ffdfc9ff-87f5-44d3-9214-78d59f84a3f8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5.375SeniorNotesDue2025Member_5d0f757c-7dbf-476e-96ac-b90fa69751d5" xlink:href="fang-20210331.xsd#fang_A5.375SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A5.375SeniorNotesDue2025Member_5d0f757c-7dbf-476e-96ac-b90fa69751d5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3.250SeniorNotesDue2026Member_57448640-d036-4138-aa7f-9631bb5fd7b5" xlink:href="fang-20210331.xsd#fang_A3.250SeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A3.250SeniorNotesDue2026Member_57448640-d036-4138-aa7f-9631bb5fd7b5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5625SeniorNotesDue2026Member_db98b7f2-60f5-472c-b78b-2eaa2ed5c3a7" xlink:href="fang-20210331.xsd#fang_A5625SeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A5625SeniorNotesDue2026Member_db98b7f2-60f5-472c-b78b-2eaa2ed5c3a7" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A7.125MediumTermNotesSeriesBMember_fc9723ad-14b3-4aed-8d3e-1d53c5026ad5" xlink:href="fang-20210331.xsd#fang_A7.125MediumTermNotesSeriesBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A7.125MediumTermNotesSeriesBMember_fc9723ad-14b3-4aed-8d3e-1d53c5026ad5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3.500SeniorNotesDue2029Member_684f5634-dd59-43b7-853a-95ce6306603b" xlink:href="fang-20210331.xsd#fang_A3.500SeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A3.500SeniorNotesDue2029Member_684f5634-dd59-43b7-853a-95ce6306603b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3125SeniorNotesDue2031Member_d5eda3b9-34ba-417c-b506-3655f1c5c3b0" xlink:href="fang-20210331.xsd#fang_A3125SeniorNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A3125SeniorNotesDue2031Member_d5eda3b9-34ba-417c-b506-3655f1c5c3b0" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4400SeniorNotesDue2051Member_0209b1b2-c82e-4b92-83a7-ed07555382c0" xlink:href="fang-20210331.xsd#fang_A4400SeniorNotesDue2051Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A4400SeniorNotesDue2051Member_0209b1b2-c82e-4b92-83a7-ed07555382c0" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DrillCoAgreementMember_b32dca09-96d2-401e-aa5f-d5d9d30b9fad" xlink:href="fang-20210331.xsd#fang_DrillCoAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_DrillCoAgreementMember_b32dca09-96d2-401e-aa5f-d5d9d30b9fad" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CompanyCreditFacilityMember_27a98e16-30fd-4e73-9ae8-182cef1e5966" xlink:href="fang-20210331.xsd#fang_CompanyCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_CompanyCreditFacilityMember_27a98e16-30fd-4e73-9ae8-182cef1e5966" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperCreditFacilityMember_4daa36b6-8014-447e-aab4-f3e8f9b46fb9" xlink:href="fang-20210331.xsd#fang_ViperCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_ViperCreditFacilityMember_4daa36b6-8014-447e-aab4-f3e8f9b46fb9" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5.375SeniorNotesDue2027Member_1afae06d-fdf9-4bb1-b1e7-15b80b3116f0" xlink:href="fang-20210331.xsd#fang_A5.375SeniorNotesDue2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A5.375SeniorNotesDue2027Member_1afae06d-fdf9-4bb1-b1e7-15b80b3116f0" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerCreditFacilityMember_ca99b7dc-4b2b-4b34-8d6c-3b75dffc2128" xlink:href="fang-20210331.xsd#fang_RattlerCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_RattlerCreditFacilityMember_ca99b7dc-4b2b-4b34-8d6c-3b75dffc2128" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5625SeniorNotesDue2025Member_5ec50016-40bd-4e04-b258-46a95ffc721d" xlink:href="fang-20210331.xsd#fang_A5625SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b1722bfc-5e5f-4b26-b8ea-f63ffd2470e1" xlink:to="loc_fang_A5625SeniorNotesDue2025Member_5ec50016-40bd-4e04-b258-46a95ffc721d" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_361ef60e-221f-4331-aa8d-2dd8329816c1" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2ba21cfa-b361-45d5-9b76-c76037e6ccd9" xlink:to="loc_dei_LegalEntityAxis_361ef60e-221f-4331-aa8d-2dd8329816c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_361ef60e-221f-4331-aa8d-2dd8329816c1_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_361ef60e-221f-4331-aa8d-2dd8329816c1" xlink:to="loc_dei_EntityDomain_361ef60e-221f-4331-aa8d-2dd8329816c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_cb695462-3c67-44bd-b2c5-37c91e7ed308" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_361ef60e-221f-4331-aa8d-2dd8329816c1" xlink:to="loc_dei_EntityDomain_cb695462-3c67-44bd-b2c5-37c91e7ed308" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperEnergyPartnersLPMember_ddc8d550-104c-46f9-a88e-8a4e326870f3" xlink:href="fang-20210331.xsd#fang_ViperEnergyPartnersLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_cb695462-3c67-44bd-b2c5-37c91e7ed308" xlink:to="loc_fang_ViperEnergyPartnersLPMember_ddc8d550-104c-46f9-a88e-8a4e326870f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerLLCMember_9693a629-3c3e-4574-afc2-3fdf3cb3a196" xlink:href="fang-20210331.xsd#fang_RattlerLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_cb695462-3c67-44bd-b2c5-37c91e7ed308" xlink:to="loc_fang_RattlerLLCMember_9693a629-3c3e-4574-afc2-3fdf3cb3a196" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTSecondAmendedandRestatedCreditFacilityDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#DEBTSecondAmendedandRestatedCreditFacilityDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTSecondAmendedandRestatedCreditFacilityDetails" xlink:type="extended" id="i9cf76af55a984fd5a2fad2e303df497a_DEBTSecondAmendedandRestatedCreditFacilityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_eb010f0a-3446-488f-8e39-49684e8778a5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_e4b31945-a1ab-46d0-a72e-14e096593b5a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_eb010f0a-3446-488f-8e39-49684e8778a5" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_e4b31945-a1ab-46d0-a72e-14e096593b5a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_cb53a64f-890a-4e13-a04c-458347dd46f6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_eb010f0a-3446-488f-8e39-49684e8778a5" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_cb53a64f-890a-4e13-a04c-458347dd46f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_6e8e5e05-1e1e-4745-abb5-4d24be9159a4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_eb010f0a-3446-488f-8e39-49684e8778a5" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_6e8e5e05-1e1e-4745-abb5-4d24be9159a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NumberOfLettersOfCreditOutstanding_ea3172f5-60f5-40d1-888b-a330e33b4321" xlink:href="fang-20210331.xsd#fang_NumberOfLettersOfCreditOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_eb010f0a-3446-488f-8e39-49684e8778a5" xlink:to="loc_fang_NumberOfLettersOfCreditOutstanding_ea3172f5-60f5-40d1-888b-a330e33b4321" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_eab1610d-c901-40b3-bc98-90f38ff3fe5b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtWeightedAverageInterestRateOverTime"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_eb010f0a-3446-488f-8e39-49684e8778a5" xlink:to="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_eab1610d-c901-40b3-bc98-90f38ff3fe5b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_fb0af53d-e853-4d7a-9c5a-bba058ec29a0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_eb010f0a-3446-488f-8e39-49684e8778a5" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_fb0af53d-e853-4d7a-9c5a-bba058ec29a0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_2d5a0f29-914d-4e39-9afd-9aee0387c3bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_fb0af53d-e853-4d7a-9c5a-bba058ec29a0" xlink:to="loc_us-gaap_DebtInstrumentAxis_2d5a0f29-914d-4e39-9afd-9aee0387c3bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_2d5a0f29-914d-4e39-9afd-9aee0387c3bf_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_2d5a0f29-914d-4e39-9afd-9aee0387c3bf" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_2d5a0f29-914d-4e39-9afd-9aee0387c3bf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_3cc31ce1-1d13-4739-9b0d-3cc5b12ee657" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_2d5a0f29-914d-4e39-9afd-9aee0387c3bf" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_3cc31ce1-1d13-4739-9b0d-3cc5b12ee657" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CompanyCreditFacilityMember_31ba8e11-7ec0-4795-aa33-e19d97403ef1" xlink:href="fang-20210331.xsd#fang_CompanyCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3cc31ce1-1d13-4739-9b0d-3cc5b12ee657" xlink:to="loc_fang_CompanyCreditFacilityMember_31ba8e11-7ec0-4795-aa33-e19d97403ef1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTMarch2021NotesOfferingDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#DEBTMarch2021NotesOfferingDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTMarch2021NotesOfferingDetails" xlink:type="extended" id="i8019c1ded9e14846918372100696b640_DEBTMarch2021NotesOfferingDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_ba67d063-7b7d-4085-bb2d-5e8840dc08c4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_5c52b2d5-0b78-490e-859f-573ce0494440" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ba67d063-7b7d-4085-bb2d-5e8840dc08c4" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_5c52b2d5-0b78-490e-859f-573ce0494440" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_e85d4360-5cfa-4a77-90a5-dcc2d5265f24" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ba67d063-7b7d-4085-bb2d-5e8840dc08c4" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_e85d4360-5cfa-4a77-90a5-dcc2d5265f24" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_1baf90dd-6fa5-4fff-aa56-52c9442ee41b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ba67d063-7b7d-4085-bb2d-5e8840dc08c4" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_1baf90dd-6fa5-4fff-aa56-52c9442ee41b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_76f2a8c6-0e33-42f4-abf7-72257b29c117" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromDebtNetOfIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ba67d063-7b7d-4085-bb2d-5e8840dc08c4" xlink:to="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_76f2a8c6-0e33-42f4-abf7-72257b29c117" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_c1181fbb-307b-4020-8c7f-6866a35456d8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ba67d063-7b7d-4085-bb2d-5e8840dc08c4" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_c1181fbb-307b-4020-8c7f-6866a35456d8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtInstrumentRedemptionPricePercentageUponChangeOfControlTriggeringEvent_7c32be02-c5e6-434c-a236-d5d80c2dd429" xlink:href="fang-20210331.xsd#fang_DebtInstrumentRedemptionPricePercentageUponChangeOfControlTriggeringEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ba67d063-7b7d-4085-bb2d-5e8840dc08c4" xlink:to="loc_fang_DebtInstrumentRedemptionPricePercentageUponChangeOfControlTriggeringEvent_7c32be02-c5e6-434c-a236-d5d80c2dd429" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_168dda8b-29c3-4c96-9425-39fd8552c31e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ba67d063-7b7d-4085-bb2d-5e8840dc08c4" xlink:to="loc_us-gaap_DebtInstrumentTable_168dda8b-29c3-4c96-9425-39fd8552c31e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_426c88ed-286c-4904-afa5-befe959ab886" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_168dda8b-29c3-4c96-9425-39fd8552c31e" xlink:to="loc_us-gaap_DebtInstrumentAxis_426c88ed-286c-4904-afa5-befe959ab886" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_426c88ed-286c-4904-afa5-befe959ab886_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_426c88ed-286c-4904-afa5-befe959ab886" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_426c88ed-286c-4904-afa5-befe959ab886_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_305498f4-b769-4267-9ede-3ddf79b8561a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_426c88ed-286c-4904-afa5-befe959ab886" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_305498f4-b769-4267-9ede-3ddf79b8561a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_March2021NotesMember_7756fccf-836b-4ec1-bebb-1dd66c34b084" xlink:href="fang-20210331.xsd#fang_March2021NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_305498f4-b769-4267-9ede-3ddf79b8561a" xlink:to="loc_fang_March2021NotesMember_7756fccf-836b-4ec1-bebb-1dd66c34b084" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A0900SeniorNotesDue2023Member_23861bbe-46fc-4da5-8dca-eafe9a9ece13" xlink:href="fang-20210331.xsd#fang_A0900SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_March2021NotesMember_7756fccf-836b-4ec1-bebb-1dd66c34b084" xlink:to="loc_fang_A0900SeniorNotesDue2023Member_23861bbe-46fc-4da5-8dca-eafe9a9ece13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3125SeniorNotesDue2031Member_f7bd27ca-8181-4b9e-9221-375c8a91d76f" xlink:href="fang-20210331.xsd#fang_A3125SeniorNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_March2021NotesMember_7756fccf-836b-4ec1-bebb-1dd66c34b084" xlink:to="loc_fang_A3125SeniorNotesDue2031Member_f7bd27ca-8181-4b9e-9221-375c8a91d76f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4400SeniorNotesDue2051Member_f8e589b5-4ee7-4563-a395-9bd568ca3eba" xlink:href="fang-20210331.xsd#fang_A4400SeniorNotesDue2051Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_March2021NotesMember_7756fccf-836b-4ec1-bebb-1dd66c34b084" xlink:to="loc_fang_A4400SeniorNotesDue2051Member_f8e589b5-4ee7-4563-a395-9bd568ca3eba" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTQEPNotesandRepurchasesofNotesDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#DEBTQEPNotesandRepurchasesofNotesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTQEPNotesandRepurchasesofNotesDetails" xlink:type="extended" id="id570b7f1e99f4d3b96efebc6e6c72ccf_DEBTQEPNotesandRepurchasesofNotesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_829c783e-2937-41ba-93fd-816aff755694" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_829c783e-2937-41ba-93fd-816aff755694" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_0b5e586b-16ff-4175-94e5-00e53ffb1d4e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_0b5e586b-16ff-4175-94e5-00e53ffb1d4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_97c3c3bd-970e-4adf-892b-3097c3b79fe5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_97c3c3bd-970e-4adf-892b-3097c3b79fe5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfSeniorDebt_759fab72-c8ae-4663-aaa9-96b657c7a9b8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RepaymentsOfSeniorDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:to="loc_us-gaap_RepaymentsOfSeniorDebt_759fab72-c8ae-4663-aaa9-96b657c7a9b8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_3ea788be-0e7a-424b-9b16-1ce87b738f59" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_3ea788be-0e7a-424b-9b16-1ce87b738f59" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_f9c3ac58-2141-45e1-b377-dc6e728354f9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:to="loc_us-gaap_LongTermDebtFairValue_f9c3ac58-2141-45e1-b377-dc6e728354f9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_faa32c04-d1f1-40e0-a096-fbeabc18ec04" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_faa32c04-d1f1-40e0-a096-fbeabc18ec04" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_7555d5c1-dabb-4535-a05f-41c27a27e6ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentRepurchasedFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:to="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_7555d5c1-dabb-4535-a05f-41c27a27e6ce" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RepurchaseOfDebtPercentageOfOutstandingDebt_a297a886-330a-473c-9bfe-7375e9fcb65f" xlink:href="fang-20210331.xsd#fang_RepurchaseOfDebtPercentageOfOutstandingDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:to="loc_fang_RepurchaseOfDebtPercentageOfOutstandingDebt_a297a886-330a-473c-9bfe-7375e9fcb65f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_d94207ce-268c-4865-95d4-d7f3c6c2b45a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_092f756c-a66c-4072-bfb6-d696477289e5" xlink:to="loc_us-gaap_DebtInstrumentTable_d94207ce-268c-4865-95d4-d7f3c6c2b45a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_c22eaf7f-934a-40af-a8c6-a526b79398b6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d94207ce-268c-4865-95d4-d7f3c6c2b45a" xlink:to="loc_us-gaap_DebtInstrumentAxis_c22eaf7f-934a-40af-a8c6-a526b79398b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c22eaf7f-934a-40af-a8c6-a526b79398b6_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_c22eaf7f-934a-40af-a8c6-a526b79398b6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c22eaf7f-934a-40af-a8c6-a526b79398b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b72b8b21-c9f8-4995-9f38-665bd1ce3ddf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_c22eaf7f-934a-40af-a8c6-a526b79398b6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b72b8b21-c9f8-4995-9f38-665bd1ce3ddf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPNotesMember_b1f0ce09-33d4-44ff-a8d0-2df761ea2865" xlink:href="fang-20210331.xsd#fang_QEPNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b72b8b21-c9f8-4995-9f38-665bd1ce3ddf" xlink:to="loc_fang_QEPNotesMember_b1f0ce09-33d4-44ff-a8d0-2df761ea2865" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5375SeniorNotesDue2022Member_ec922b43-6952-4dec-a054-b800281e5761" xlink:href="fang-20210331.xsd#fang_A5375SeniorNotesDue2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_QEPNotesMember_b1f0ce09-33d4-44ff-a8d0-2df761ea2865" xlink:to="loc_fang_A5375SeniorNotesDue2022Member_ec922b43-6952-4dec-a054-b800281e5761" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5250SeniorNotesDue2023Member_e05030b0-4af6-4d5a-9a25-f6354f950a6a" xlink:href="fang-20210331.xsd#fang_A5250SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_QEPNotesMember_b1f0ce09-33d4-44ff-a8d0-2df761ea2865" xlink:to="loc_fang_A5250SeniorNotesDue2023Member_e05030b0-4af6-4d5a-9a25-f6354f950a6a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5625SeniorNotesDue2026Member_3029a8f3-4bcd-41b8-adb3-a02bfe35fed1" xlink:href="fang-20210331.xsd#fang_A5625SeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_QEPNotesMember_b1f0ce09-33d4-44ff-a8d0-2df761ea2865" xlink:to="loc_fang_A5625SeniorNotesDue2026Member_3029a8f3-4bcd-41b8-adb3-a02bfe35fed1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5.375SeniorNotesDue2025Member_f93d873a-b489-45a0-a913-b35d9fef221b" xlink:href="fang-20210331.xsd#fang_A5.375SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b72b8b21-c9f8-4995-9f38-665bd1ce3ddf" xlink:to="loc_fang_A5.375SeniorNotesDue2025Member_f93d873a-b489-45a0-a913-b35d9fef221b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTVipersCreditAgreementDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#DEBTVipersCreditAgreementDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTVipersCreditAgreementDetails" xlink:type="extended" id="i2dd469923ac245388c2b5568858bdcd5_DEBTVipersCreditAgreementDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_5532b6eb-9763-4566-91bc-6777e32d80f6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_c1e4e1c7-77e4-40b4-835e-fa62e8ab3b6c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_5532b6eb-9763-4566-91bc-6777e32d80f6" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_c1e4e1c7-77e4-40b4-835e-fa62e8ab3b6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_c10756f2-3aa8-429c-bc17-2afb70d18bc6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_5532b6eb-9763-4566-91bc-6777e32d80f6" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_c10756f2-3aa8-429c-bc17-2afb70d18bc6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_db70daea-89fb-4378-a2a1-342196fd421a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_5532b6eb-9763-4566-91bc-6777e32d80f6" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_db70daea-89fb-4378-a2a1-342196fd421a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_2fb6a47c-440d-424c-9256-5e693f50064e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_5532b6eb-9763-4566-91bc-6777e32d80f6" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_2fb6a47c-440d-424c-9256-5e693f50064e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_cb5d1ca9-1292-487d-9315-2ee938771fa7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtWeightedAverageInterestRateOverTime"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_5532b6eb-9763-4566-91bc-6777e32d80f6" xlink:to="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_cb5d1ca9-1292-487d-9315-2ee938771fa7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_5dbbbd79-8056-4d3a-bb6e-c80476e36289" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_5532b6eb-9763-4566-91bc-6777e32d80f6" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_5dbbbd79-8056-4d3a-bb6e-c80476e36289" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_b5077454-d43b-4f05-b7f8-d4676852be9a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_5dbbbd79-8056-4d3a-bb6e-c80476e36289" xlink:to="loc_us-gaap_DebtInstrumentAxis_b5077454-d43b-4f05-b7f8-d4676852be9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b5077454-d43b-4f05-b7f8-d4676852be9a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_b5077454-d43b-4f05-b7f8-d4676852be9a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b5077454-d43b-4f05-b7f8-d4676852be9a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_fd1527c7-a51b-4537-8de9-6554db952299" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_b5077454-d43b-4f05-b7f8-d4676852be9a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_fd1527c7-a51b-4537-8de9-6554db952299" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperCreditFacilityMember_c955c443-2cec-40f3-ad77-4e45cffe15b5" xlink:href="fang-20210331.xsd#fang_ViperCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_fd1527c7-a51b-4537-8de9-6554db952299" xlink:to="loc_fang_ViperCreditFacilityMember_c955c443-2cec-40f3-ad77-4e45cffe15b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_2b62b094-2bb0-47e8-933b-170bbca9d7b8" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_5dbbbd79-8056-4d3a-bb6e-c80476e36289" xlink:to="loc_dei_LegalEntityAxis_2b62b094-2bb0-47e8-933b-170bbca9d7b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2b62b094-2bb0-47e8-933b-170bbca9d7b8_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2b62b094-2bb0-47e8-933b-170bbca9d7b8" xlink:to="loc_dei_EntityDomain_2b62b094-2bb0-47e8-933b-170bbca9d7b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b6759526-db49-497d-9b21-7cd72818c67b" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2b62b094-2bb0-47e8-933b-170bbca9d7b8" xlink:to="loc_dei_EntityDomain_b6759526-db49-497d-9b21-7cd72818c67b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperEnergyPartnersLPMember_e20a038c-174d-46cb-bd34-537d1036e4ea" xlink:href="fang-20210331.xsd#fang_ViperEnergyPartnersLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_b6759526-db49-497d-9b21-7cd72818c67b" xlink:to="loc_fang_ViperEnergyPartnersLPMember_e20a038c-174d-46cb-bd34-537d1036e4ea" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTRattlersCreditAgreementDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#DEBTRattlersCreditAgreementDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTRattlersCreditAgreementDetails" xlink:type="extended" id="i8f28c8ee577341f39d5ee35bfb239397_DEBTRattlersCreditAgreementDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_f20f1f4f-40f2-42ff-9a33-becbf14019a1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_c06017ba-b9b7-4e70-bb03-77eded85fdd4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_f20f1f4f-40f2-42ff-9a33-becbf14019a1" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_c06017ba-b9b7-4e70-bb03-77eded85fdd4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_LineofCreditFacilityMaximumBorrowingCapacitySubjectToCommitments_b7288021-e4d4-42a3-8eaf-40b3d48e250d" xlink:href="fang-20210331.xsd#fang_LineofCreditFacilityMaximumBorrowingCapacitySubjectToCommitments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_f20f1f4f-40f2-42ff-9a33-becbf14019a1" xlink:to="loc_fang_LineofCreditFacilityMaximumBorrowingCapacitySubjectToCommitments_b7288021-e4d4-42a3-8eaf-40b3d48e250d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_0546ff74-0cd8-4f11-b9b8-4b822d61403a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_f20f1f4f-40f2-42ff-9a33-becbf14019a1" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_0546ff74-0cd8-4f11-b9b8-4b822d61403a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_ca94171a-ca37-4113-8ae4-00a574426b49" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_f20f1f4f-40f2-42ff-9a33-becbf14019a1" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_ca94171a-ca37-4113-8ae4-00a574426b49" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_062d0339-9071-427e-b00b-28079d440072" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtWeightedAverageInterestRateOverTime"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_f20f1f4f-40f2-42ff-9a33-becbf14019a1" xlink:to="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_062d0339-9071-427e-b00b-28079d440072" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_f7421f92-7d69-4ffc-8da3-863ca473c024" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_f20f1f4f-40f2-42ff-9a33-becbf14019a1" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_f7421f92-7d69-4ffc-8da3-863ca473c024" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_a89c15f2-ac70-4bad-a2db-1429e2bb197c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_f7421f92-7d69-4ffc-8da3-863ca473c024" xlink:to="loc_us-gaap_DebtInstrumentAxis_a89c15f2-ac70-4bad-a2db-1429e2bb197c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a89c15f2-ac70-4bad-a2db-1429e2bb197c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_a89c15f2-ac70-4bad-a2db-1429e2bb197c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a89c15f2-ac70-4bad-a2db-1429e2bb197c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0a4081de-ffb3-4cab-a3de-dad2e3a9cdef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_a89c15f2-ac70-4bad-a2db-1429e2bb197c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0a4081de-ffb3-4cab-a3de-dad2e3a9cdef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerCreditFacilityMember_32198bc6-b882-4f7f-94b6-52219bc1d3d7" xlink:href="fang-20210331.xsd#fang_RattlerCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_0a4081de-ffb3-4cab-a3de-dad2e3a9cdef" xlink:to="loc_fang_RattlerCreditFacilityMember_32198bc6-b882-4f7f-94b6-52219bc1d3d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_ecb49d02-2d0f-48ca-9455-961aa671a8b0" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_f7421f92-7d69-4ffc-8da3-863ca473c024" xlink:to="loc_dei_LegalEntityAxis_ecb49d02-2d0f-48ca-9455-961aa671a8b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ecb49d02-2d0f-48ca-9455-961aa671a8b0_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_ecb49d02-2d0f-48ca-9455-961aa671a8b0" xlink:to="loc_dei_EntityDomain_ecb49d02-2d0f-48ca-9455-961aa671a8b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_c4db6f7b-0e8b-466e-bfd9-87d9f81671df" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_ecb49d02-2d0f-48ca-9455-961aa671a8b0" xlink:to="loc_dei_EntityDomain_c4db6f7b-0e8b-466e-bfd9-87d9f81671df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerLLCMember_2b51bd58-f77a-4dce-93a4-86856ee295f9" xlink:href="fang-20210331.xsd#fang_RattlerLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_c4db6f7b-0e8b-466e-bfd9-87d9f81671df" xlink:to="loc_fang_RattlerLLCMember_2b51bd58-f77a-4dce-93a4-86856ee295f9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHARE" xlink:type="simple" xlink:href="fang-20210331.xsd#CAPITALSTOCKANDEARNINGSPERSHARE"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHARE" xlink:type="extended" id="i083be06b9c41465aa3e4e98f52f1020a_CAPITALSTOCKANDEARNINGSPERSHARE"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHARETables" xlink:type="simple" xlink:href="fang-20210331.xsd#CAPITALSTOCKANDEARNINGSPERSHARETables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHARETables" xlink:type="extended" id="i9f89d919932a4cefa56fc1e0e50a302d_CAPITALSTOCKANDEARNINGSPERSHARETables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHARENarrativeDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#CAPITALSTOCKANDEARNINGSPERSHARENarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHARENarrativeDetails" xlink:type="extended" id="i014b7ea76b7743cd8a3882f44977036e_CAPITALSTOCKANDEARNINGSPERSHARENarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_b70cad26-4b8d-4e99-a622-bd9afd56b7bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_859a28ed-3d50-4d5f-b059-132984f75173" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b70cad26-4b8d-4e99-a622-bd9afd56b7bf" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_859a28ed-3d50-4d5f-b059-132984f75173" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_2b9ec6d8-8d24-4113-84fe-fc2f3aa3bc17" xlink:href="fang-20210331.xsd#fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b70cad26-4b8d-4e99-a622-bd9afd56b7bf" xlink:to="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_2b9ec6d8-8d24-4113-84fe-fc2f3aa3bc17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c8deb63c-f284-46ee-923e-4d45e8d4fb42" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b70cad26-4b8d-4e99-a622-bd9afd56b7bf" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c8deb63c-f284-46ee-923e-4d45e8d4fb42" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_28e01249-d215-428b-906d-6e4cc2b6b8ae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c8deb63c-f284-46ee-923e-4d45e8d4fb42" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_28e01249-d215-428b-906d-6e4cc2b6b8ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_28e01249-d215-428b-906d-6e4cc2b6b8ae_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_28e01249-d215-428b-906d-6e4cc2b6b8ae" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_28e01249-d215-428b-906d-6e4cc2b6b8ae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b1410cf2-9adc-4138-ba25-3ba9993dac2e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_28e01249-d215-428b-906d-6e4cc2b6b8ae" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b1410cf2-9adc-4138-ba25-3ba9993dac2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCMember_f43a297f-c73a-4dcf-9191-aed2d8d0ed94" xlink:href="fang-20210331.xsd#fang_GuidonOperatingLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b1410cf2-9adc-4138-ba25-3ba9993dac2e" xlink:to="loc_fang_GuidonOperatingLLCMember_f43a297f-c73a-4dcf-9191-aed2d8d0ed94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_aef20bab-829e-4d36-b0e5-4d4a36259914" xlink:href="fang-20210331.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b1410cf2-9adc-4138-ba25-3ba9993dac2e" xlink:to="loc_fang_QEPResourcesIncMember_aef20bab-829e-4d36-b0e5-4d4a36259914" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHAREEarningsPerShareDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#CAPITALSTOCKANDEARNINGSPERSHAREEarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHAREEarningsPerShareDetails" xlink:type="extended" id="ifbb7851c1bfb4fb79f158eeca24f383f_CAPITALSTOCKANDEARNINGSPERSHAREEarningsPerShareDetails"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHAREChangeinOwnershipofConsolidatedSubsidiariesDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#CAPITALSTOCKANDEARNINGSPERSHAREChangeinOwnershipofConsolidatedSubsidiariesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHAREChangeinOwnershipofConsolidatedSubsidiariesDetails" xlink:type="extended" id="i344d5ba12a024a01bb9dfd8bb4928604_CAPITALSTOCKANDEARNINGSPERSHAREChangeinOwnershipofConsolidatedSubsidiariesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_f2dfd8bc-ded9-4930-b169-64d1ba133341" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_ce48e178-be05-4ccf-a13b-5477b8bc79d1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_f2dfd8bc-ded9-4930-b169-64d1ba133341" xlink:to="loc_us-gaap_NetIncomeLoss_ce48e178-be05-4ccf-a13b-5477b8bc79d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet_5f7c11a3-e8cd-4589-9736-4027d3f7088b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_f2dfd8bc-ded9-4930-b169-64d1ba133341" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet_5f7c11a3-e8cd-4589-9736-4027d3f7088b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_c9c6421d-a97d-4b48-bf8f-0e738059e81f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_f2dfd8bc-ded9-4930-b169-64d1ba133341" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_c9c6421d-a97d-4b48-bf8f-0e738059e81f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_597dcb26-22c2-44fb-bf63-9453eb916d63" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_f2dfd8bc-ded9-4930-b169-64d1ba133341" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_597dcb26-22c2-44fb-bf63-9453eb916d63" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_e0265804-4cdd-4125-9352-1360f07622dd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_597dcb26-22c2-44fb-bf63-9453eb916d63" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_e0265804-4cdd-4125-9352-1360f07622dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_e0265804-4cdd-4125-9352-1360f07622dd_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_e0265804-4cdd-4125-9352-1360f07622dd" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_e0265804-4cdd-4125-9352-1360f07622dd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_7fc4e0a2-e43f-47ae-a66d-b0f6cba46126" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_e0265804-4cdd-4125-9352-1360f07622dd" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_7fc4e0a2-e43f-47ae-a66d-b0f6cba46126" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnerMember_60fa5681-eac2-43ad-82b2-490b207b0610" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LimitedPartnerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_7fc4e0a2-e43f-47ae-a66d-b0f6cba46126" xlink:to="loc_us-gaap_LimitedPartnerMember_60fa5681-eac2-43ad-82b2-490b207b0610" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATION" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYBASEDCOMPENSATION"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATION" xlink:type="extended" id="i4b6c7b8a7cbd4f5897943615ef4889bf_EQUITYBASEDCOMPENSATION"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONTables" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYBASEDCOMPENSATIONTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONTables" xlink:type="extended" id="i965d5877ec9c4148b7f8df776128f8dc_EQUITYBASEDCOMPENSATIONTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONScheduleofStockBasedCompensationPlansandRelatedCostsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYBASEDCOMPENSATIONScheduleofStockBasedCompensationPlansandRelatedCostsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONScheduleofStockBasedCompensationPlansandRelatedCostsDetails" xlink:type="extended" id="i5dc6870f8e8b4a7884971f9c993e4c26_EQUITYBASEDCOMPENSATIONScheduleofStockBasedCompensationPlansandRelatedCostsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_8159087b-d0fb-48e5-8175-848506d901be" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_3d2d9e60-059f-49c8-b32f-bd0be29fde1c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_8159087b-d0fb-48e5-8175-848506d901be" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_3d2d9e60-059f-49c8-b32f-bd0be29fde1c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_02a3f52f-5da2-4299-b43b-06f73f367360" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_8159087b-d0fb-48e5-8175-848506d901be" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_02a3f52f-5da2-4299-b43b-06f73f367360" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_62fb113b-e4ab-4285-8715-6bc16c6c2d23" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_8159087b-d0fb-48e5-8175-848506d901be" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_62fb113b-e4ab-4285-8715-6bc16c6c2d23" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_f0457c21-37f0-4768-ade5-3aebf9b1ed99" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_62fb113b-e4ab-4285-8715-6bc16c6c2d23" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_f0457c21-37f0-4768-ade5-3aebf9b1ed99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_f0457c21-37f0-4768-ade5-3aebf9b1ed99_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_f0457c21-37f0-4768-ade5-3aebf9b1ed99" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_f0457c21-37f0-4768-ade5-3aebf9b1ed99_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_0546e030-d1fb-4874-9a16-a0b219ee3fcb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_f0457c21-37f0-4768-ade5-3aebf9b1ed99" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_0546e030-d1fb-4874-9a16-a0b219ee3fcb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_136837cf-3662-4553-a4cd-59a47b936349" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_0546e030-d1fb-4874-9a16-a0b219ee3fcb" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_136837cf-3662-4553-a4cd-59a47b936349" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRestrictedStockUnitsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYBASEDCOMPENSATIONRestrictedStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRestrictedStockUnitsDetails" xlink:type="extended" id="i9d406e8f68474ea8be1ecbc9bbb39313_EQUITYBASEDCOMPENSATIONRestrictedStockUnitsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d05143f-9d25-4e2d-a8eb-e6fa0c299b1b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c28744f9-77b1-4d9a-9795-4f5eb16ba8f1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d05143f-9d25-4e2d-a8eb-e6fa0c299b1b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c28744f9-77b1-4d9a-9795-4f5eb16ba8f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_c545c4e0-1efe-4ddb-b38a-7e43759dd704" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c28744f9-77b1-4d9a-9795-4f5eb16ba8f1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_c545c4e0-1efe-4ddb-b38a-7e43759dd704" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_2846097e-3585-4270-a715-87b52c88f2ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c28744f9-77b1-4d9a-9795-4f5eb16ba8f1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_2846097e-3585-4270-a715-87b52c88f2ca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_4db650f8-fc45-45bf-857b-14ec78c9b822" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c28744f9-77b1-4d9a-9795-4f5eb16ba8f1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_4db650f8-fc45-45bf-857b-14ec78c9b822" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_8263d3c4-92e3-4dc8-9405-27476faa897d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c28744f9-77b1-4d9a-9795-4f5eb16ba8f1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_8263d3c4-92e3-4dc8-9405-27476faa897d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_5b68a0b0-c2c1-4474-bfe8-8384c841e1b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_439a729f-bf50-4669-8e1a-9b96a579bebe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d05143f-9d25-4e2d-a8eb-e6fa0c299b1b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_439a729f-bf50-4669-8e1a-9b96a579bebe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_d771ecd8-532f-47e6-a3bf-97dbbecf0d41" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_439a729f-bf50-4669-8e1a-9b96a579bebe" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_d771ecd8-532f-47e6-a3bf-97dbbecf0d41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_ae82bad5-0413-4e6b-a583-65ac069a81d3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_439a729f-bf50-4669-8e1a-9b96a579bebe" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_ae82bad5-0413-4e6b-a583-65ac069a81d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_25649bb2-0831-43d0-95cb-0dc8f46b7c73" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_439a729f-bf50-4669-8e1a-9b96a579bebe" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_25649bb2-0831-43d0-95cb-0dc8f46b7c73" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_3b0b1ca3-fc2f-49e7-9b3f-01055b2d893b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_439a729f-bf50-4669-8e1a-9b96a579bebe" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_3b0b1ca3-fc2f-49e7-9b3f-01055b2d893b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_893032ec-28e3-4957-8a5c-046b7b4c4fdd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44d1a1aa-106b-4ac0-aed2-280a40da3fb5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d05143f-9d25-4e2d-a8eb-e6fa0c299b1b" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44d1a1aa-106b-4ac0-aed2-280a40da3fb5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_9a98d006-d5aa-41dc-900e-6725603fb9e0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44d1a1aa-106b-4ac0-aed2-280a40da3fb5" xlink:to="loc_us-gaap_PlanNameAxis_9a98d006-d5aa-41dc-900e-6725603fb9e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_9a98d006-d5aa-41dc-900e-6725603fb9e0_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_9a98d006-d5aa-41dc-900e-6725603fb9e0" xlink:to="loc_us-gaap_PlanNameDomain_9a98d006-d5aa-41dc-900e-6725603fb9e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_c0c6b19a-8e22-4bd9-a091-77aeeb647b85" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_9a98d006-d5aa-41dc-900e-6725603fb9e0" xlink:to="loc_us-gaap_PlanNameDomain_c0c6b19a-8e22-4bd9-a091-77aeeb647b85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_6aa112a6-1fe1-45a7-9574-9997cbac132c" xlink:href="fang-20210331.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_c0c6b19a-8e22-4bd9-a091-77aeeb647b85" xlink:to="loc_fang_EquityPlanMember_6aa112a6-1fe1-45a7-9574-9997cbac132c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_5a330427-82f5-44c5-a4fc-de5a8655bc41" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44d1a1aa-106b-4ac0-aed2-280a40da3fb5" xlink:to="loc_us-gaap_AwardTypeAxis_5a330427-82f5-44c5-a4fc-de5a8655bc41" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5a330427-82f5-44c5-a4fc-de5a8655bc41_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_5a330427-82f5-44c5-a4fc-de5a8655bc41" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5a330427-82f5-44c5-a4fc-de5a8655bc41_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_859af86b-f1fc-49b1-9f3e-0c163a5c4fad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_5a330427-82f5-44c5-a4fc-de5a8655bc41" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_859af86b-f1fc-49b1-9f3e-0c163a5c4fad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_cdf69f78-c86e-4e93-8467-f034e906b9bc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_859af86b-f1fc-49b1-9f3e-0c163a5c4fad" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_cdf69f78-c86e-4e93-8467-f034e906b9bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_7b66414a-9999-48e5-ac43-ba09006f22a1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44d1a1aa-106b-4ac0-aed2-280a40da3fb5" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_7b66414a-9999-48e5-ac43-ba09006f22a1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7b66414a-9999-48e5-ac43-ba09006f22a1_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_7b66414a-9999-48e5-ac43-ba09006f22a1" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7b66414a-9999-48e5-ac43-ba09006f22a1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1b40776e-f8c0-4e8e-8f87-7229fe3d2663" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_7b66414a-9999-48e5-ac43-ba09006f22a1" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1b40776e-f8c0-4e8e-8f87-7229fe3d2663" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_12d7a8c8-0e61-4a34-a928-fea4ba155f35" xlink:href="fang-20210331.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1b40776e-f8c0-4e8e-8f87-7229fe3d2663" xlink:to="loc_fang_QEPResourcesIncMember_12d7a8c8-0e61-4a34-a928-fea4ba155f35" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRestrictedStockUnitsNarrativesDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYBASEDCOMPENSATIONRestrictedStockUnitsNarrativesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRestrictedStockUnitsNarrativesDetails" xlink:type="extended" id="i38ef26c665b04229b7337ea66898c144_EQUITYBASEDCOMPENSATIONRestrictedStockUnitsNarrativesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9347ee4f-df4a-4ad5-9fbd-359c38819740" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_61b41616-2f95-4d4d-a3ce-fa851e3adf7c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9347ee4f-df4a-4ad5-9fbd-359c38819740" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_61b41616-2f95-4d4d-a3ce-fa851e3adf7c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_de6d0b0f-7dfc-4252-a4f5-a166320970e6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9347ee4f-df4a-4ad5-9fbd-359c38819740" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_de6d0b0f-7dfc-4252-a4f5-a166320970e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_b9f09b11-44ba-4f43-84b1-95b93b69c9d8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9347ee4f-df4a-4ad5-9fbd-359c38819740" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_b9f09b11-44ba-4f43-84b1-95b93b69c9d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_16a2e7be-0fb3-4916-bf39-796b8160ecf5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9347ee4f-df4a-4ad5-9fbd-359c38819740" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_16a2e7be-0fb3-4916-bf39-796b8160ecf5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_83a1b90b-dcc6-466f-a9a5-153d2aac362b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_16a2e7be-0fb3-4916-bf39-796b8160ecf5" xlink:to="loc_us-gaap_AwardTypeAxis_83a1b90b-dcc6-466f-a9a5-153d2aac362b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83a1b90b-dcc6-466f-a9a5-153d2aac362b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_83a1b90b-dcc6-466f-a9a5-153d2aac362b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83a1b90b-dcc6-466f-a9a5-153d2aac362b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_23da1897-65ea-4cbc-a370-d7e42e95171d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_83a1b90b-dcc6-466f-a9a5-153d2aac362b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_23da1897-65ea-4cbc-a370-d7e42e95171d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_277ce638-fabd-4527-a39c-eecd022292d4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_23da1897-65ea-4cbc-a370-d7e42e95171d" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_277ce638-fabd-4527-a39c-eecd022292d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_7f511897-8bfb-4ba3-963d-b37af6f123d7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_16a2e7be-0fb3-4916-bf39-796b8160ecf5" xlink:to="loc_us-gaap_PlanNameAxis_7f511897-8bfb-4ba3-963d-b37af6f123d7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_7f511897-8bfb-4ba3-963d-b37af6f123d7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_7f511897-8bfb-4ba3-963d-b37af6f123d7" xlink:to="loc_us-gaap_PlanNameDomain_7f511897-8bfb-4ba3-963d-b37af6f123d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_cf279161-4120-4b15-a73e-ffab33f81e85" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_7f511897-8bfb-4ba3-963d-b37af6f123d7" xlink:to="loc_us-gaap_PlanNameDomain_cf279161-4120-4b15-a73e-ffab33f81e85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_2d491334-68da-4af5-a5df-dcf6cde19b30" xlink:href="fang-20210331.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_cf279161-4120-4b15-a73e-ffab33f81e85" xlink:to="loc_fang_EquityPlanMember_2d491334-68da-4af5-a5df-dcf6cde19b30" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONPerformanceBasedRestrictedStockUnitsNarrativesDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYBASEDCOMPENSATIONPerformanceBasedRestrictedStockUnitsNarrativesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONPerformanceBasedRestrictedStockUnitsNarrativesDetails" xlink:type="extended" id="ic74e779dbe1641368ce849a8f4aa0c5a_EQUITYBASEDCOMPENSATIONPerformanceBasedRestrictedStockUnitsNarrativesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1be4c491-1d76-4f6e-895e-5fb6a2ef52e1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_1a733c01-15fd-417c-ba1b-74aa3f5037b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1be4c491-1d76-4f6e-895e-5fb6a2ef52e1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_1a733c01-15fd-417c-ba1b-74aa3f5037b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorizedPercentofSharesGranted_31cc222a-def5-4b83-be74-b6224b4c8001" xlink:href="fang-20210331.xsd#fang_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorizedPercentofSharesGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1be4c491-1d76-4f6e-895e-5fb6a2ef52e1" xlink:to="loc_fang_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorizedPercentofSharesGranted_31cc222a-def5-4b83-be74-b6224b4c8001" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_c727adc7-6d53-40f8-aec0-3bf423f9c1bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1be4c491-1d76-4f6e-895e-5fb6a2ef52e1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_c727adc7-6d53-40f8-aec0-3bf423f9c1bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfInstallments_73657b78-00dc-4e57-a070-e1413661e3bf" xlink:href="fang-20210331.xsd#fang_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1be4c491-1d76-4f6e-895e-5fb6a2ef52e1" xlink:to="loc_fang_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfInstallments_73657b78-00dc-4e57-a070-e1413661e3bf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_fb9d6b9e-4fba-47e8-bac7-eee98bba323c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1be4c491-1d76-4f6e-895e-5fb6a2ef52e1" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_fb9d6b9e-4fba-47e8-bac7-eee98bba323c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_18a5624e-f0c9-4e01-b2e8-69c47d2fce2a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1be4c491-1d76-4f6e-895e-5fb6a2ef52e1" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_18a5624e-f0c9-4e01-b2e8-69c47d2fce2a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_25132cf1-b197-4ff7-a7f3-88509b819ec7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1be4c491-1d76-4f6e-895e-5fb6a2ef52e1" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_25132cf1-b197-4ff7-a7f3-88509b819ec7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_06c52dc1-0d03-44b2-a129-0abf5e72e450" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_25132cf1-b197-4ff7-a7f3-88509b819ec7" xlink:to="loc_us-gaap_AwardTypeAxis_06c52dc1-0d03-44b2-a129-0abf5e72e450" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_06c52dc1-0d03-44b2-a129-0abf5e72e450_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_06c52dc1-0d03-44b2-a129-0abf5e72e450" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_06c52dc1-0d03-44b2-a129-0abf5e72e450_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1df16a3a-51cc-41fe-b700-b581fda35dd6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_06c52dc1-0d03-44b2-a129-0abf5e72e450" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1df16a3a-51cc-41fe-b700-b581fda35dd6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_e8ab0d62-a27b-4de2-8dc4-67474fec771c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1df16a3a-51cc-41fe-b700-b581fda35dd6" xlink:to="loc_us-gaap_PerformanceSharesMember_e8ab0d62-a27b-4de2-8dc4-67474fec771c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_07ae252e-e5bd-4ac8-a4d2-9870f98d01af" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_25132cf1-b197-4ff7-a7f3-88509b819ec7" xlink:to="loc_us-gaap_PlanNameAxis_07ae252e-e5bd-4ac8-a4d2-9870f98d01af" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_07ae252e-e5bd-4ac8-a4d2-9870f98d01af_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_07ae252e-e5bd-4ac8-a4d2-9870f98d01af" xlink:to="loc_us-gaap_PlanNameDomain_07ae252e-e5bd-4ac8-a4d2-9870f98d01af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_39764217-8983-41a7-8fed-9d37eb5bae34" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_07ae252e-e5bd-4ac8-a4d2-9870f98d01af" xlink:to="loc_us-gaap_PlanNameDomain_39764217-8983-41a7-8fed-9d37eb5bae34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_353304d5-39d7-43dd-8760-dc91383660ad" xlink:href="fang-20210331.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_39764217-8983-41a7-8fed-9d37eb5bae34" xlink:to="loc_fang_EquityPlanMember_353304d5-39d7-43dd-8760-dc91383660ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_a919adeb-cdcf-477c-829b-bc90333c4138" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_25132cf1-b197-4ff7-a7f3-88509b819ec7" xlink:to="loc_srt_RangeAxis_a919adeb-cdcf-477c-829b-bc90333c4138" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a919adeb-cdcf-477c-829b-bc90333c4138_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_a919adeb-cdcf-477c-829b-bc90333c4138" xlink:to="loc_srt_RangeMember_a919adeb-cdcf-477c-829b-bc90333c4138_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_acc239d0-8b59-49c9-afd7-ee3a7e75423d" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_a919adeb-cdcf-477c-829b-bc90333c4138" xlink:to="loc_srt_RangeMember_acc239d0-8b59-49c9-afd7-ee3a7e75423d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_0f94fa0c-7059-4a91-97bd-c84a5cc53f49" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_acc239d0-8b59-49c9-afd7-ee3a7e75423d" xlink:to="loc_srt_MinimumMember_0f94fa0c-7059-4a91-97bd-c84a5cc53f49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_60122cfe-9254-4f79-b251-3aca7929cb86" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_acc239d0-8b59-49c9-afd7-ee3a7e75423d" xlink:to="loc_srt_MaximumMember_60122cfe-9254-4f79-b251-3aca7929cb86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_9acce0a4-eef0-4a35-9c7d-fcdb2462a4b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_25132cf1-b197-4ff7-a7f3-88509b819ec7" xlink:to="loc_us-gaap_VestingAxis_9acce0a4-eef0-4a35-9c7d-fcdb2462a4b9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_9acce0a4-eef0-4a35-9c7d-fcdb2462a4b9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_9acce0a4-eef0-4a35-9c7d-fcdb2462a4b9" xlink:to="loc_us-gaap_VestingDomain_9acce0a4-eef0-4a35-9c7d-fcdb2462a4b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_35aafc8e-b535-42a4-8bfa-57be4b7ffbf3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_9acce0a4-eef0-4a35-9c7d-fcdb2462a4b9" xlink:to="loc_us-gaap_VestingDomain_35aafc8e-b535-42a4-8bfa-57be4b7ffbf3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_9b2b93f3-84d8-4300-8658-6219e81f8479" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_35aafc8e-b535-42a4-8bfa-57be4b7ffbf3" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_9b2b93f3-84d8-4300-8658-6219e81f8479" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_14db5dcb-239d-4aca-84fb-62670c75bade" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_35aafc8e-b535-42a4-8bfa-57be4b7ffbf3" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_14db5dcb-239d-4aca-84fb-62670c75bade" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONValuationAssumptionsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYBASEDCOMPENSATIONValuationAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONValuationAssumptionsDetails" xlink:type="extended" id="i3ef0699c70594febb9910452d77e955c_EQUITYBASEDCOMPENSATIONValuationAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6e25af29-8527-4950-aacb-ab6d40f60239" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_e8b4cdd8-7c67-4d33-a24b-f1f35b51348c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6e25af29-8527-4950-aacb-ab6d40f60239" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_e8b4cdd8-7c67-4d33-a24b-f1f35b51348c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_0fc14a81-443c-40a1-9946-8ce35a82d369" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6e25af29-8527-4950-aacb-ab6d40f60239" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_0fc14a81-443c-40a1-9946-8ce35a82d369" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_6705c65c-a0e7-40b2-b357-60152a8aea17" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6e25af29-8527-4950-aacb-ab6d40f60239" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_6705c65c-a0e7-40b2-b357-60152a8aea17" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_3166f712-c139-47fa-a85b-b2dbb6f405b1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6e25af29-8527-4950-aacb-ab6d40f60239" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_3166f712-c139-47fa-a85b-b2dbb6f405b1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4b7a57df-73f4-4038-806a-17e0250de002" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6e25af29-8527-4950-aacb-ab6d40f60239" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4b7a57df-73f4-4038-806a-17e0250de002" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_f9fc4044-da9e-4e53-8642-ec8cf0eb28a7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4b7a57df-73f4-4038-806a-17e0250de002" xlink:to="loc_us-gaap_PlanNameAxis_f9fc4044-da9e-4e53-8642-ec8cf0eb28a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_f9fc4044-da9e-4e53-8642-ec8cf0eb28a7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_f9fc4044-da9e-4e53-8642-ec8cf0eb28a7" xlink:to="loc_us-gaap_PlanNameDomain_f9fc4044-da9e-4e53-8642-ec8cf0eb28a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_e2f29b64-3ffa-411f-b525-d7370d9adb6e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_f9fc4044-da9e-4e53-8642-ec8cf0eb28a7" xlink:to="loc_us-gaap_PlanNameDomain_e2f29b64-3ffa-411f-b525-d7370d9adb6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_7235995a-8007-4873-ba28-10c7c838d7fe" xlink:href="fang-20210331.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_e2f29b64-3ffa-411f-b525-d7370d9adb6e" xlink:to="loc_fang_EquityPlanMember_7235995a-8007-4873-ba28-10c7c838d7fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_74962d4f-5036-4019-bf81-db2172088eb9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4b7a57df-73f4-4038-806a-17e0250de002" xlink:to="loc_us-gaap_VestingAxis_74962d4f-5036-4019-bf81-db2172088eb9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_74962d4f-5036-4019-bf81-db2172088eb9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_74962d4f-5036-4019-bf81-db2172088eb9" xlink:to="loc_us-gaap_VestingDomain_74962d4f-5036-4019-bf81-db2172088eb9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_986269f5-eb01-4009-b779-a4b6d55348a7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_74962d4f-5036-4019-bf81-db2172088eb9" xlink:to="loc_us-gaap_VestingDomain_986269f5-eb01-4009-b779-a4b6d55348a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_041f37d4-9f38-44bf-bc74-c0d7a1f9f0fd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_986269f5-eb01-4009-b779-a4b6d55348a7" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_041f37d4-9f38-44bf-bc74-c0d7a1f9f0fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_a26e4c25-5235-4f52-8fcd-63314f87f7c5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4b7a57df-73f4-4038-806a-17e0250de002" xlink:to="loc_us-gaap_AwardTypeAxis_a26e4c25-5235-4f52-8fcd-63314f87f7c5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a26e4c25-5235-4f52-8fcd-63314f87f7c5_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_a26e4c25-5235-4f52-8fcd-63314f87f7c5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a26e4c25-5235-4f52-8fcd-63314f87f7c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9b0e4399-2e4b-4cb0-8d1a-86197831d39f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_a26e4c25-5235-4f52-8fcd-63314f87f7c5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9b0e4399-2e4b-4cb0-8d1a-86197831d39f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_0a61a666-1952-45d4-b09d-66d1cccf5873" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9b0e4399-2e4b-4cb0-8d1a-86197831d39f" xlink:to="loc_us-gaap_PerformanceSharesMember_0a61a666-1952-45d4-b09d-66d1cccf5873" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONPerformanceRestrictedStockActivityDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYBASEDCOMPENSATIONPerformanceRestrictedStockActivityDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONPerformanceRestrictedStockActivityDetails" xlink:type="extended" id="i55e925121285472b81e6b7ad43112e8a_EQUITYBASEDCOMPENSATIONPerformanceRestrictedStockActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5c6a4561-45d4-49d7-bc80-541b92d876f4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_bdbdcbe2-82b2-4c33-80c9-59196213c7ae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5c6a4561-45d4-49d7-bc80-541b92d876f4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_bdbdcbe2-82b2-4c33-80c9-59196213c7ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ff5e3db0-aebb-4d06-9d06-a6b02cb4d5d2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_bdbdcbe2-82b2-4c33-80c9-59196213c7ae" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ff5e3db0-aebb-4d06-9d06-a6b02cb4d5d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_bfbb1413-b811-4456-8370-691136fc239b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_bdbdcbe2-82b2-4c33-80c9-59196213c7ae" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_bfbb1413-b811-4456-8370-691136fc239b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_136fe781-7bb9-4a26-a657-e6e50250b57a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_86e38a7e-edb2-41ef-98a0-c7fd961b44ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5c6a4561-45d4-49d7-bc80-541b92d876f4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_86e38a7e-edb2-41ef-98a0-c7fd961b44ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_468e0f3d-27a6-44ef-a1ac-3e20a40a6ca6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_86e38a7e-edb2-41ef-98a0-c7fd961b44ce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_468e0f3d-27a6-44ef-a1ac-3e20a40a6ca6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_6088641a-a246-42fd-b20e-d3345b848ca1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_86e38a7e-edb2-41ef-98a0-c7fd961b44ce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_6088641a-a246-42fd-b20e-d3345b848ca1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_cae4e65f-4f97-42f3-81c9-c1e63ce34625" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ShareBasedCompensationArrangementbyShareBasedPaymentMaximumAwardPotential_27938ed2-aa00-438f-8435-d2c03c9480a5" xlink:href="fang-20210331.xsd#fang_ShareBasedCompensationArrangementbyShareBasedPaymentMaximumAwardPotential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5c6a4561-45d4-49d7-bc80-541b92d876f4" xlink:to="loc_fang_ShareBasedCompensationArrangementbyShareBasedPaymentMaximumAwardPotential_27938ed2-aa00-438f-8435-d2c03c9480a5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_954776da-1a37-4f87-b102-4d813ac04b32" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5c6a4561-45d4-49d7-bc80-541b92d876f4" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_954776da-1a37-4f87-b102-4d813ac04b32" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_6ed025d8-cc83-4c81-84a6-806af784e750" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_954776da-1a37-4f87-b102-4d813ac04b32" xlink:to="loc_us-gaap_PlanNameAxis_6ed025d8-cc83-4c81-84a6-806af784e750" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_6ed025d8-cc83-4c81-84a6-806af784e750_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_6ed025d8-cc83-4c81-84a6-806af784e750" xlink:to="loc_us-gaap_PlanNameDomain_6ed025d8-cc83-4c81-84a6-806af784e750_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_f33e1ff5-fac5-4a83-8690-6a8767e8f126" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_6ed025d8-cc83-4c81-84a6-806af784e750" xlink:to="loc_us-gaap_PlanNameDomain_f33e1ff5-fac5-4a83-8690-6a8767e8f126" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_ab9198c7-ead8-43c1-9037-151093ea4961" xlink:href="fang-20210331.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_f33e1ff5-fac5-4a83-8690-6a8767e8f126" xlink:to="loc_fang_EquityPlanMember_ab9198c7-ead8-43c1-9037-151093ea4961" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_edc1f17b-f869-41e2-8119-d50434a56814" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_954776da-1a37-4f87-b102-4d813ac04b32" xlink:to="loc_us-gaap_AwardTypeAxis_edc1f17b-f869-41e2-8119-d50434a56814" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_edc1f17b-f869-41e2-8119-d50434a56814_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_edc1f17b-f869-41e2-8119-d50434a56814" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_edc1f17b-f869-41e2-8119-d50434a56814_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_244952b2-5f6f-4d0e-b5c4-7a5a131644f9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_edc1f17b-f869-41e2-8119-d50434a56814" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_244952b2-5f6f-4d0e-b5c4-7a5a131644f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_16f268ec-187f-4ade-9467-0008ece3ecec" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_244952b2-5f6f-4d0e-b5c4-7a5a131644f9" xlink:to="loc_us-gaap_PerformanceSharesMember_16f268ec-187f-4ade-9467-0008ece3ecec" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRattlerPhantomUnitsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYBASEDCOMPENSATIONRattlerPhantomUnitsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRattlerPhantomUnitsDetails" xlink:type="extended" id="i8340f4c74c1043de9b4c0018beb92359_EQUITYBASEDCOMPENSATIONRattlerPhantomUnitsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d079db51-3fbf-424d-a45f-bf389b89db15" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7da3e01c-383d-43c0-a1df-c9f77e67dbf2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d079db51-3fbf-424d-a45f-bf389b89db15" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7da3e01c-383d-43c0-a1df-c9f77e67dbf2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_a90718b8-ed53-4fa3-b450-8aac53fd5a95" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7da3e01c-383d-43c0-a1df-c9f77e67dbf2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_a90718b8-ed53-4fa3-b450-8aac53fd5a95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_3053324a-d4ae-4ec6-a888-f18e94e4b36d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7da3e01c-383d-43c0-a1df-c9f77e67dbf2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_3053324a-d4ae-4ec6-a888-f18e94e4b36d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_063fba19-997d-4ac3-9ed5-c7f6b983db12" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7da3e01c-383d-43c0-a1df-c9f77e67dbf2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_063fba19-997d-4ac3-9ed5-c7f6b983db12" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_e7164596-8110-4719-8143-b91b87abd3f6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7da3e01c-383d-43c0-a1df-c9f77e67dbf2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_e7164596-8110-4719-8143-b91b87abd3f6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_41d1800f-9e2a-46a1-a04c-6fc5e91445ee" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_212f8fe4-92cf-497d-a367-bcda666e0549" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d079db51-3fbf-424d-a45f-bf389b89db15" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_212f8fe4-92cf-497d-a367-bcda666e0549" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b4475329-7379-47c1-a013-f6c4f96b4a84" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_212f8fe4-92cf-497d-a367-bcda666e0549" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b4475329-7379-47c1-a013-f6c4f96b4a84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_f5059937-45e7-4018-bc48-e37c7fdc0b91" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_212f8fe4-92cf-497d-a367-bcda666e0549" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_f5059937-45e7-4018-bc48-e37c7fdc0b91" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_3c7a47d2-eec2-400e-8065-27bbc4774105" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_212f8fe4-92cf-497d-a367-bcda666e0549" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_3c7a47d2-eec2-400e-8065-27bbc4774105" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_ce44f816-5b58-43fe-bd70-2f48ba4804d4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_212f8fe4-92cf-497d-a367-bcda666e0549" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_ce44f816-5b58-43fe-bd70-2f48ba4804d4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b000ab2f-1999-4ffa-bfbf-856bcb5da973" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ec9f5271-3d2a-4bc0-87b9-1bbf07939e3a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d079db51-3fbf-424d-a45f-bf389b89db15" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ec9f5271-3d2a-4bc0-87b9-1bbf07939e3a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_0775cff6-7fdd-48f0-b648-7deff1f1a906" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ec9f5271-3d2a-4bc0-87b9-1bbf07939e3a" xlink:to="loc_us-gaap_AwardTypeAxis_0775cff6-7fdd-48f0-b648-7deff1f1a906" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0775cff6-7fdd-48f0-b648-7deff1f1a906_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_0775cff6-7fdd-48f0-b648-7deff1f1a906" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0775cff6-7fdd-48f0-b648-7deff1f1a906_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1936f87a-688a-4dc8-bc65-c07836f61fc0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_0775cff6-7fdd-48f0-b648-7deff1f1a906" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1936f87a-688a-4dc8-bc65-c07836f61fc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PhantomShareUnitsPSUsMember_a0fbcfa0-d109-436e-97ac-cc869e6924ee" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PhantomShareUnitsPSUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1936f87a-688a-4dc8-bc65-c07836f61fc0" xlink:to="loc_us-gaap_PhantomShareUnitsPSUsMember_a0fbcfa0-d109-436e-97ac-cc869e6924ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_1030f723-e44a-4f9f-a530-adf3ebd45e5c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ec9f5271-3d2a-4bc0-87b9-1bbf07939e3a" xlink:to="loc_us-gaap_PlanNameAxis_1030f723-e44a-4f9f-a530-adf3ebd45e5c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_1030f723-e44a-4f9f-a530-adf3ebd45e5c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_1030f723-e44a-4f9f-a530-adf3ebd45e5c" xlink:to="loc_us-gaap_PlanNameDomain_1030f723-e44a-4f9f-a530-adf3ebd45e5c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_2445e4a4-138a-475e-91fb-74ee62db404d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_1030f723-e44a-4f9f-a530-adf3ebd45e5c" xlink:to="loc_us-gaap_PlanNameDomain_2445e4a4-138a-475e-91fb-74ee62db404d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerMidstreamLPLongTermIncentivePlanMember_fc8cc507-cdaf-4f86-aa8a-80317799fb7c" xlink:href="fang-20210331.xsd#fang_RattlerMidstreamLPLongTermIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_2445e4a4-138a-475e-91fb-74ee62db404d" xlink:to="loc_fang_RattlerMidstreamLPLongTermIncentivePlanMember_fc8cc507-cdaf-4f86-aa8a-80317799fb7c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRattlerPhantomUnitsNarrativesDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#EQUITYBASEDCOMPENSATIONRattlerPhantomUnitsNarrativesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRattlerPhantomUnitsNarrativesDetails" xlink:type="extended" id="iebbce670e78540d4b133d1721633ade6_EQUITYBASEDCOMPENSATIONRattlerPhantomUnitsNarrativesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71a0c50e-7a9f-41d2-9613-a4b36a1ccec7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_8a7f8b90-1c62-4143-b280-e9e653f054eb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71a0c50e-7a9f-41d2-9613-a4b36a1ccec7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_8a7f8b90-1c62-4143-b280-e9e653f054eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_0fb05d45-30b2-4ba2-aa32-d42e37003443" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71a0c50e-7a9f-41d2-9613-a4b36a1ccec7" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_0fb05d45-30b2-4ba2-aa32-d42e37003443" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_6f208cc9-a1e3-4ab0-a94a-6a441971520a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71a0c50e-7a9f-41d2-9613-a4b36a1ccec7" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_6f208cc9-a1e3-4ab0-a94a-6a441971520a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6cddbeb7-17d3-46b5-9722-482120129d69" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71a0c50e-7a9f-41d2-9613-a4b36a1ccec7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6cddbeb7-17d3-46b5-9722-482120129d69" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_857d90c7-ee1f-4bd4-bc40-a8af872376b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6cddbeb7-17d3-46b5-9722-482120129d69" xlink:to="loc_us-gaap_AwardTypeAxis_857d90c7-ee1f-4bd4-bc40-a8af872376b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_857d90c7-ee1f-4bd4-bc40-a8af872376b9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_857d90c7-ee1f-4bd4-bc40-a8af872376b9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_857d90c7-ee1f-4bd4-bc40-a8af872376b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f01c3731-c222-4679-b34b-839a9376d549" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_857d90c7-ee1f-4bd4-bc40-a8af872376b9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f01c3731-c222-4679-b34b-839a9376d549" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PhantomShareUnitsPSUsMember_a29844a4-30a9-4bfd-b971-8e9554444975" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PhantomShareUnitsPSUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f01c3731-c222-4679-b34b-839a9376d549" xlink:to="loc_us-gaap_PhantomShareUnitsPSUsMember_a29844a4-30a9-4bfd-b971-8e9554444975" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_165fd5c7-eb43-46e2-9e4c-733dde7da85e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6cddbeb7-17d3-46b5-9722-482120129d69" xlink:to="loc_us-gaap_PlanNameAxis_165fd5c7-eb43-46e2-9e4c-733dde7da85e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_165fd5c7-eb43-46e2-9e4c-733dde7da85e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_165fd5c7-eb43-46e2-9e4c-733dde7da85e" xlink:to="loc_us-gaap_PlanNameDomain_165fd5c7-eb43-46e2-9e4c-733dde7da85e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_aa89d3f7-1793-4dc6-9339-013771e2538f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_165fd5c7-eb43-46e2-9e4c-733dde7da85e" xlink:to="loc_us-gaap_PlanNameDomain_aa89d3f7-1793-4dc6-9339-013771e2538f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerMidstreamLPLongTermIncentivePlanMember_c2796efa-ca1f-49de-a331-db715577d763" xlink:href="fang-20210331.xsd#fang_RattlerMidstreamLPLongTermIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_aa89d3f7-1793-4dc6-9339-013771e2538f" xlink:to="loc_fang_RattlerMidstreamLPLongTermIncentivePlanMember_c2796efa-ca1f-49de-a331-db715577d763" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/INCOMETAXES" xlink:type="simple" xlink:href="fang-20210331.xsd#INCOMETAXES"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/INCOMETAXES" xlink:type="extended" id="i8be3187f1f9a4ea5a41539f9bb104098_INCOMETAXES"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/INCOMETAXESDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#INCOMETAXESDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/INCOMETAXESDetails" xlink:type="extended" id="ib8193bdc1cfa4f59b8dfcfb792790830_INCOMETAXESDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_174e00ef-c281-4c20-a477-6c22866e3040" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_d8d72d97-c0e2-48fb-81a4-22945b82cbf4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_174e00ef-c281-4c20-a477-6c22866e3040" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_d8d72d97-c0e2-48fb-81a4-22945b82cbf4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_3f763a79-ab3e-4521-b164-6a7b8ece0737" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_174e00ef-c281-4c20-a477-6c22866e3040" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_3f763a79-ab3e-4521-b164-6a7b8ece0737" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_Discreteincometaxbenefitrelatedtodeferredtaxesrecordedduringtheperiod_549055b8-6fd8-4a67-9eda-96c8ee44f166" xlink:href="fang-20210331.xsd#fang_Discreteincometaxbenefitrelatedtodeferredtaxesrecordedduringtheperiod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_174e00ef-c281-4c20-a477-6c22866e3040" xlink:to="loc_fang_Discreteincometaxbenefitrelatedtodeferredtaxesrecordedduringtheperiod_549055b8-6fd8-4a67-9eda-96c8ee44f166" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_cf86a722-60e7-46b6-8999-f50de936937f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_174e00ef-c281-4c20-a477-6c22866e3040" xlink:to="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_cf86a722-60e7-46b6-8999-f50de936937f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CurrentFederalTaxesReceivable_f8608ae6-d99b-46d6-a753-6180a397959d" xlink:href="fang-20210331.xsd#fang_CurrentFederalTaxesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_174e00ef-c281-4c20-a477-6c22866e3040" xlink:to="loc_fang_CurrentFederalTaxesReceivable_f8608ae6-d99b-46d6-a753-6180a397959d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesReceivable_1ce13f0e-2313-45d0-ae63-be66d3e3a8c9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_174e00ef-c281-4c20-a477-6c22866e3040" xlink:to="loc_us-gaap_IncomeTaxesReceivable_1ce13f0e-2313-45d0-ae63-be66d3e3a8c9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesReceivableNoncurrent_f4640b61-cf24-411f-8f56-d67a41a14ffd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxesReceivableNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_174e00ef-c281-4c20-a477-6c22866e3040" xlink:to="loc_us-gaap_IncomeTaxesReceivableNoncurrent_f4640b61-cf24-411f-8f56-d67a41a14ffd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_6dd86016-eadf-43ee-9261-471bb395a0ea" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_174e00ef-c281-4c20-a477-6c22866e3040" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_6dd86016-eadf-43ee-9261-471bb395a0ea" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_ac831303-b98b-4d0a-afc0-9fb2b3c52968" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_6dd86016-eadf-43ee-9261-471bb395a0ea" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_ac831303-b98b-4d0a-afc0-9fb2b3c52968" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ac831303-b98b-4d0a-afc0-9fb2b3c52968_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_ac831303-b98b-4d0a-afc0-9fb2b3c52968" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ac831303-b98b-4d0a-afc0-9fb2b3c52968_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_78b4581c-0932-4695-80d7-70589c984ad5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_ac831303-b98b-4d0a-afc0-9fb2b3c52968" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_78b4581c-0932-4695-80d7-70589c984ad5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_883dad55-0e8f-4018-8cf9-9cd22ba280e7" xlink:href="fang-20210331.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_78b4581c-0932-4695-80d7-70589c984ad5" xlink:to="loc_fang_QEPResourcesIncMember_883dad55-0e8f-4018-8cf9-9cd22ba280e7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DERIVATIVES" xlink:type="simple" xlink:href="fang-20210331.xsd#DERIVATIVES"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DERIVATIVES" xlink:type="extended" id="i0e9c0dcccbc2455daae6e103e5a4b7e5_DERIVATIVES"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DERIVATIVESTables" xlink:type="simple" xlink:href="fang-20210331.xsd#DERIVATIVESTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DERIVATIVESTables" xlink:type="extended" id="i9b82b1a47fa1476caceabbe6ef5a09cf_DERIVATIVESTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DERIVATIVESOpenDerivativePositionsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#DERIVATIVESOpenDerivativePositionsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DERIVATIVESOpenDerivativePositionsDetails" xlink:type="extended" id="i3a4b28f3463f4ced85a2d0dbde777bc5_DERIVATIVESOpenDerivativePositionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_1e4a914b-11ff-4565-b940-1cce2a585e7f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountVolume_fb80d553-fbc1-41ea-a0b5-f1e66eb1e49b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_1e4a914b-11ff-4565-b940-1cce2a585e7f" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountVolume_fb80d553-fbc1-41ea-a0b5-f1e66eb1e49b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_7ddda78a-f950-4ea5-8417-04247c6cd0bc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_1e4a914b-11ff-4565-b940-1cce2a585e7f" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_7ddda78a-f950-4ea5-8417-04247c6cd0bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeWeightedAverageDifferential_722e4da8-0595-452c-a687-ebfc4db532f3" xlink:href="fang-20210331.xsd#fang_DerivativeWeightedAverageDifferential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_1e4a914b-11ff-4565-b940-1cce2a585e7f" xlink:to="loc_fang_DerivativeWeightedAverageDifferential_722e4da8-0595-452c-a687-ebfc4db532f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeSwapTypeFixedPrice_9a732503-259c-4208-8b4b-36626d3d859d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeSwapTypeFixedPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_1e4a914b-11ff-4565-b940-1cce2a585e7f" xlink:to="loc_us-gaap_DerivativeSwapTypeFixedPrice_9a732503-259c-4208-8b4b-36626d3d859d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFloorPrice_6b3ed293-34ea-4c3a-8059-0cd4ec86feda" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeFloorPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_1e4a914b-11ff-4565-b940-1cce2a585e7f" xlink:to="loc_us-gaap_DerivativeFloorPrice_6b3ed293-34ea-4c3a-8059-0cd4ec86feda" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCapPrice_ccf6014d-c8d9-4d8d-98af-13dce777eae5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeCapPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_1e4a914b-11ff-4565-b940-1cce2a585e7f" xlink:to="loc_us-gaap_DerivativeCapPrice_ccf6014d-c8d9-4d8d-98af-13dce777eae5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativePutPrice_8d9fc6a6-a89d-40b9-8873-fc4580f6e31d" xlink:href="fang-20210331.xsd#fang_DerivativePutPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_1e4a914b-11ff-4565-b940-1cce2a585e7f" xlink:to="loc_fang_DerivativePutPrice_8d9fc6a6-a89d-40b9-8873-fc4580f6e31d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_8c7fe5f4-9b85-4ef5-83a4-32ddb1104d18" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_1e4a914b-11ff-4565-b940-1cce2a585e7f" xlink:to="loc_us-gaap_DerivativeTable_8c7fe5f4-9b85-4ef5-83a4-32ddb1104d18" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyAxis_c97bb18e-0987-4cd1-92e8-e384d097225b" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EnergyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8c7fe5f4-9b85-4ef5-83a4-32ddb1104d18" xlink:to="loc_srt_EnergyAxis_c97bb18e-0987-4cd1-92e8-e384d097225b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_c97bb18e-0987-4cd1-92e8-e384d097225b_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_EnergyAxis_c97bb18e-0987-4cd1-92e8-e384d097225b" xlink:to="loc_srt_EnergyDomain_c97bb18e-0987-4cd1-92e8-e384d097225b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_74bf586a-e1fe-4c6f-8c1b-ed6c0c89c2ae" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_EnergyAxis_c97bb18e-0987-4cd1-92e8-e384d097225b" xlink:to="loc_srt_EnergyDomain_74bf586a-e1fe-4c6f-8c1b-ed6c0c89c2ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CrudeOilMember_3f2eba3b-838b-47bb-abed-0ab3ce25e31e" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CrudeOilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_74bf586a-e1fe-4c6f-8c1b-ed6c0c89c2ae" xlink:to="loc_srt_CrudeOilMember_3f2eba3b-838b-47bb-abed-0ab3ce25e31e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NaturalGasReservesMember_58a7833d-f16e-4f82-a89f-8001905e24bc" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NaturalGasReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_74bf586a-e1fe-4c6f-8c1b-ed6c0c89c2ae" xlink:to="loc_srt_NaturalGasReservesMember_58a7833d-f16e-4f82-a89f-8001905e24bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NaturalGasLiquidsReservesMember_f30aa3cc-6b21-41be-93e3-83e6c1f2cb55" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NaturalGasLiquidsReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_74bf586a-e1fe-4c6f-8c1b-ed6c0c89c2ae" xlink:to="loc_srt_NaturalGasLiquidsReservesMember_f30aa3cc-6b21-41be-93e3-83e6c1f2cb55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearAxis_90af0d57-4fcd-4330-820c-2e60c9ca0d0a" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementYearAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8c7fe5f4-9b85-4ef5-83a4-32ddb1104d18" xlink:to="loc_fang_DerivativeSettlementYearAxis_90af0d57-4fcd-4330-820c-2e60c9ca0d0a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearDomain_90af0d57-4fcd-4330-820c-2e60c9ca0d0a_default" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fang_DerivativeSettlementYearAxis_90af0d57-4fcd-4330-820c-2e60c9ca0d0a" xlink:to="loc_fang_DerivativeSettlementYearDomain_90af0d57-4fcd-4330-820c-2e60c9ca0d0a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearDomain_4c7016c7-6300-4d7b-93ae-70a7dfe7a4f8" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fang_DerivativeSettlementYearAxis_90af0d57-4fcd-4330-820c-2e60c9ca0d0a" xlink:to="loc_fang_DerivativeSettlementYearDomain_4c7016c7-6300-4d7b-93ae-70a7dfe7a4f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearOneMember_3bbbb4ef-fab7-4671-87cb-6a44ab67a701" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementYearOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementYearDomain_4c7016c7-6300-4d7b-93ae-70a7dfe7a4f8" xlink:to="loc_fang_DerivativeSettlementYearOneMember_3bbbb4ef-fab7-4671-87cb-6a44ab67a701" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearTwoMember_5dc910b7-c6aa-45e7-aabd-25232299f4c3" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementYearTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementYearDomain_4c7016c7-6300-4d7b-93ae-70a7dfe7a4f8" xlink:to="loc_fang_DerivativeSettlementYearTwoMember_5dc910b7-c6aa-45e7-aabd-25232299f4c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthAxis_df9fa7a6-cecc-4758-b80b-82c3dce616dd" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8c7fe5f4-9b85-4ef5-83a4-32ddb1104d18" xlink:to="loc_fang_DerivativeSettlementMonthAxis_df9fa7a6-cecc-4758-b80b-82c3dce616dd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthDomain_df9fa7a6-cecc-4758-b80b-82c3dce616dd_default" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fang_DerivativeSettlementMonthAxis_df9fa7a6-cecc-4758-b80b-82c3dce616dd" xlink:to="loc_fang_DerivativeSettlementMonthDomain_df9fa7a6-cecc-4758-b80b-82c3dce616dd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthDomain_5c46b019-71cd-43f8-87a7-f699a0fbfa8f" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fang_DerivativeSettlementMonthAxis_df9fa7a6-cecc-4758-b80b-82c3dce616dd" xlink:to="loc_fang_DerivativeSettlementMonthDomain_5c46b019-71cd-43f8-87a7-f699a0fbfa8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthOneMember_7726bae6-964e-449b-b3a4-48854a00850e" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_5c46b019-71cd-43f8-87a7-f699a0fbfa8f" xlink:to="loc_fang_DerivativeSettlementMonthOneMember_7726bae6-964e-449b-b3a4-48854a00850e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthTwoMember_9e1188cc-f97c-45f9-bf09-228f15ed2322" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_5c46b019-71cd-43f8-87a7-f699a0fbfa8f" xlink:to="loc_fang_DerivativeSettlementMonthTwoMember_9e1188cc-f97c-45f9-bf09-228f15ed2322" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthThreeMember_9f511f38-5806-420e-a200-730759cb2ece" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_5c46b019-71cd-43f8-87a7-f699a0fbfa8f" xlink:to="loc_fang_DerivativeSettlementMonthThreeMember_9f511f38-5806-420e-a200-730759cb2ece" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthFourMember_1e21bb7e-3e23-4e38-a680-c7bae0051dea" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_5c46b019-71cd-43f8-87a7-f699a0fbfa8f" xlink:to="loc_fang_DerivativeSettlementMonthFourMember_1e21bb7e-3e23-4e38-a680-c7bae0051dea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthFiveMember_0dd67e2b-3828-41ff-8c38-a9f6f3b814d4" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_5c46b019-71cd-43f8-87a7-f699a0fbfa8f" xlink:to="loc_fang_DerivativeSettlementMonthFiveMember_0dd67e2b-3828-41ff-8c38-a9f6f3b814d4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthSixMember_af4c774b-08fc-473e-8183-c17bbb030533" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthSixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_5c46b019-71cd-43f8-87a7-f699a0fbfa8f" xlink:to="loc_fang_DerivativeSettlementMonthSixMember_af4c774b-08fc-473e-8183-c17bbb030533" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthSevenMember_de3adacc-2721-4458-9114-c2fd619c9338" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthSevenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_5c46b019-71cd-43f8-87a7-f699a0fbfa8f" xlink:to="loc_fang_DerivativeSettlementMonthSevenMember_de3adacc-2721-4458-9114-c2fd619c9338" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthEightMember_a57fec78-225e-4900-807a-1ffcac73af77" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthEightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_5c46b019-71cd-43f8-87a7-f699a0fbfa8f" xlink:to="loc_fang_DerivativeSettlementMonthEightMember_a57fec78-225e-4900-807a-1ffcac73af77" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_471be071-689e-4643-9f0f-0df98465c2fe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8c7fe5f4-9b85-4ef5-83a4-32ddb1104d18" xlink:to="loc_us-gaap_FinancialInstrumentAxis_471be071-689e-4643-9f0f-0df98465c2fe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_471be071-689e-4643-9f0f-0df98465c2fe_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_471be071-689e-4643-9f0f-0df98465c2fe" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_471be071-689e-4643-9f0f-0df98465c2fe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7100d243-a2e9-4921-9907-a4494f83a988" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_471be071-689e-4643-9f0f-0df98465c2fe" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7100d243-a2e9-4921-9907-a4494f83a988" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SwapMember_aca4c4e5-c721-4063-8b86-f51970dcd32c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7100d243-a2e9-4921-9907-a4494f83a988" xlink:to="loc_us-gaap_SwapMember_aca4c4e5-c721-4063-8b86-f51970dcd32c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BasisSwapMember_4ab863e7-8c1d-4fd2-9efd-ccd67c66efed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BasisSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7100d243-a2e9-4921-9907-a4494f83a988" xlink:to="loc_us-gaap_BasisSwapMember_4ab863e7-8c1d-4fd2-9efd-ccd67c66efed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SwaptionMember_7d1064da-2948-4d7c-ba4a-dd42665c3d67" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SwaptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7100d243-a2e9-4921-9907-a4494f83a988" xlink:to="loc_us-gaap_SwaptionMember_7d1064da-2948-4d7c-ba4a-dd42665c3d67" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RollingHedgeMember_b297a4eb-b9fd-412f-99cd-2c49132818d4" xlink:href="fang-20210331.xsd#fang_RollingHedgeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7100d243-a2e9-4921-9907-a4494f83a988" xlink:to="loc_fang_RollingHedgeMember_b297a4eb-b9fd-412f-99cd-2c49132818d4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CostlessCollarMember_f264e1df-5458-4d9b-8ae6-778943c7ef93" xlink:href="fang-20210331.xsd#fang_CostlessCollarMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7100d243-a2e9-4921-9907-a4494f83a988" xlink:to="loc_fang_CostlessCollarMember_f264e1df-5458-4d9b-8ae6-778943c7ef93" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_1da8d177-3a92-4d9f-a3e7-39620cfad645" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8c7fe5f4-9b85-4ef5-83a4-32ddb1104d18" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_1da8d177-3a92-4d9f-a3e7-39620cfad645" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_1da8d177-3a92-4d9f-a3e7-39620cfad645_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_1da8d177-3a92-4d9f-a3e7-39620cfad645" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_1da8d177-3a92-4d9f-a3e7-39620cfad645_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_6a38a9e4-5c81-4f60-85dd-70c66cc4e120" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_1da8d177-3a92-4d9f-a3e7-39620cfad645" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_6a38a9e4-5c81-4f60-85dd-70c66cc4e120" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WTIMember_1f1a0a4c-59e2-46c9-a203-e806e214654a" xlink:href="fang-20210331.xsd#fang_WTIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6a38a9e4-5c81-4f60-85dd-70c66cc4e120" xlink:to="loc_fang_WTIMember_1f1a0a4c-59e2-46c9-a203-e806e214654a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WTIHoustonArgusMember_2332072f-70ce-47b4-a1c8-fad6b6de4964" xlink:href="fang-20210331.xsd#fang_WTIHoustonArgusMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6a38a9e4-5c81-4f60-85dd-70c66cc4e120" xlink:to="loc_fang_WTIHoustonArgusMember_2332072f-70ce-47b4-a1c8-fad6b6de4964" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BrentMember_3662d98d-6fad-4642-a59b-7386b6463761" xlink:href="fang-20210331.xsd#fang_BrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6a38a9e4-5c81-4f60-85dd-70c66cc4e120" xlink:to="loc_fang_BrentMember_3662d98d-6fad-4642-a59b-7386b6463761" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ArgusWTIMidlandMember_863ef6fd-bef6-4123-bcb2-61f966b7be85" xlink:href="fang-20210331.xsd#fang_ArgusWTIMidlandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6a38a9e4-5c81-4f60-85dd-70c66cc4e120" xlink:to="loc_fang_ArgusWTIMidlandMember_863ef6fd-bef6-4123-bcb2-61f966b7be85" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_HenryHubMember_3849b46c-3e01-4c95-a200-4a63978de9e2" xlink:href="fang-20210331.xsd#fang_HenryHubMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6a38a9e4-5c81-4f60-85dd-70c66cc4e120" xlink:to="loc_fang_HenryHubMember_3849b46c-3e01-4c95-a200-4a63978de9e2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WahaHubMember_3f12cad4-5650-4745-a320-3b6082764e1a" xlink:href="fang-20210331.xsd#fang_WahaHubMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6a38a9e4-5c81-4f60-85dd-70c66cc4e120" xlink:to="loc_fang_WahaHubMember_3f12cad4-5650-4745-a320-3b6082764e1a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_MontBelvieuPropaneMember_99ca9527-9465-4e76-b70c-dd8227284ae0" xlink:href="fang-20210331.xsd#fang_MontBelvieuPropaneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6a38a9e4-5c81-4f60-85dd-70c66cc4e120" xlink:to="loc_fang_MontBelvieuPropaneMember_99ca9527-9465-4e76-b70c-dd8227284ae0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionAxis_c2eab3df-de9e-4b21-b962-4247481b7036" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PositionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_8c7fe5f4-9b85-4ef5-83a4-32ddb1104d18" xlink:to="loc_us-gaap_PositionAxis_c2eab3df-de9e-4b21-b962-4247481b7036" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_c2eab3df-de9e-4b21-b962-4247481b7036_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PositionAxis_c2eab3df-de9e-4b21-b962-4247481b7036" xlink:to="loc_us-gaap_PositionDomain_c2eab3df-de9e-4b21-b962-4247481b7036_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_7920dd62-c636-4366-94f3-d1e1138b6833" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PositionAxis_c2eab3df-de9e-4b21-b962-4247481b7036" xlink:to="loc_us-gaap_PositionDomain_7920dd62-c636-4366-94f3-d1e1138b6833" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortMember_c11e751f-4cf8-4d21-b4c9-96c59ab32c87" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_7920dd62-c636-4366-94f3-d1e1138b6833" xlink:to="loc_us-gaap_ShortMember_c11e751f-4cf8-4d21-b4c9-96c59ab32c87" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DERIVATIVESGainsandLossesonDerivativeInstrumentsIncludedinStatementofOperationsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#DERIVATIVESGainsandLossesonDerivativeInstrumentsIncludedinStatementofOperationsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DERIVATIVESGainsandLossesonDerivativeInstrumentsIncludedinStatementofOperationsDetails" xlink:type="extended" id="i2720e8f8d2db4bb5ab7911afdea5f648_DERIVATIVESGainsandLossesonDerivativeInstrumentsIncludedinStatementofOperationsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_880a54b2-5b17-45ca-bd14-5eb36036c862" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_a444c81d-9123-43fc-9968-c66a594d82fb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_880a54b2-5b17-45ca-bd14-5eb36036c862" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_a444c81d-9123-43fc-9968-c66a594d82fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfDerivatives_3cb95158-7d85-43ba-aa7b-5e6634a93526" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_880a54b2-5b17-45ca-bd14-5eb36036c862" xlink:to="loc_us-gaap_GainLossOnSaleOfDerivatives_3cb95158-7d85-43ba-aa7b-5e6634a93526" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCashReceivedOnHedge_f6505d96-c4ff-4524-a952-1bb5bc7d19d2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeCashReceivedOnHedge"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_880a54b2-5b17-45ca-bd14-5eb36036c862" xlink:to="loc_us-gaap_DerivativeCashReceivedOnHedge_f6505d96-c4ff-4524-a952-1bb5bc7d19d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_52d46060-1e03-4a3d-bd68-211c58710f7b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_880a54b2-5b17-45ca-bd14-5eb36036c862" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_52d46060-1e03-4a3d-bd68-211c58710f7b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_b32e9a30-2c46-432f-84fa-a22521276318" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_52d46060-1e03-4a3d-bd68-211c58710f7b" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_b32e9a30-2c46-432f-84fa-a22521276318" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_b32e9a30-2c46-432f-84fa-a22521276318_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_b32e9a30-2c46-432f-84fa-a22521276318" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_b32e9a30-2c46-432f-84fa-a22521276318_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_6509d21e-ec8c-4250-8d87-0a313ed04335" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_b32e9a30-2c46-432f-84fa-a22521276318" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_6509d21e-ec8c-4250-8d87-0a313ed04335" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_d61fcd05-4164-4e1d-8bcc-54d25518add0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6509d21e-ec8c-4250-8d87-0a313ed04335" xlink:to="loc_us-gaap_CommodityContractMember_d61fcd05-4164-4e1d-8bcc-54d25518add0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_de61a88b-5e56-4768-ab27-b8f08a1723cf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6509d21e-ec8c-4250-8d87-0a313ed04335" xlink:to="loc_us-gaap_InterestRateContractMember_de61a88b-5e56-4768-ab27-b8f08a1723cf" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTS" xlink:type="simple" xlink:href="fang-20210331.xsd#FAIRVALUEMEASUREMENTS"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTS" xlink:type="extended" id="i6002d4d8ac374988aef7cf58ef6873b1_FAIRVALUEMEASUREMENTS"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTSTables" xlink:type="simple" xlink:href="fang-20210331.xsd#FAIRVALUEMEASUREMENTSTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTSTables" xlink:type="extended" id="i58f3d1ad926749b2b148e70c1a1d6815_FAIRVALUEMEASUREMENTSTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTSRecurringMeasurementsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#FAIRVALUEMEASUREMENTSRecurringMeasurementsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTSRecurringMeasurementsDetails" xlink:type="extended" id="idf120f8c94e04f0e83dad1363f2c04c8_FAIRVALUEMEASUREMENTSRecurringMeasurementsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_d44b2ee8-ddb1-4483-bd35-fb8a1d9a4c88" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsAbstract_4232cb3e-db6c-4b5d-bd34-ce386072381b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_d44b2ee8-ddb1-4483-bd35-fb8a1d9a4c88" xlink:to="loc_us-gaap_DerivativeAssetsAbstract_4232cb3e-db6c-4b5d-bd34-ce386072381b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetCurrentAbstract_5c826438-0f4d-47b4-9705-e9fa48f15b98" xlink:href="fang-20210331.xsd#fang_DerivativeAssetCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_4232cb3e-db6c-4b5d-bd34-ce386072381b" xlink:to="loc_fang_DerivativeAssetCurrentAbstract_5c826438-0f4d-47b4-9705-e9fa48f15b98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetFairValueGrossAssetCurrent_d0e2071e-8cd4-45a8-ba0c-4b9421f9d954" xlink:href="fang-20210331.xsd#fang_DerivativeAssetFairValueGrossAssetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetCurrentAbstract_5c826438-0f4d-47b4-9705-e9fa48f15b98" xlink:to="loc_fang_DerivativeAssetFairValueGrossAssetCurrent_d0e2071e-8cd4-45a8-ba0c-4b9421f9d954" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetFairValueGrossLiabilityCurrent_87bcf1f9-8e66-438a-acf0-11ed23b53bbd" xlink:href="fang-20210331.xsd#fang_DerivativeAssetFairValueGrossLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetCurrentAbstract_5c826438-0f4d-47b4-9705-e9fa48f15b98" xlink:to="loc_fang_DerivativeAssetFairValueGrossLiabilityCurrent_87bcf1f9-8e66-438a-acf0-11ed23b53bbd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsCurrent_68ff1791-b0ae-473f-bcb9-b62cfacf8c0b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetCurrentAbstract_5c826438-0f4d-47b4-9705-e9fa48f15b98" xlink:to="loc_us-gaap_DerivativeAssetsCurrent_68ff1791-b0ae-473f-bcb9-b62cfacf8c0b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetNonCurrentAbstract_f8c266ee-eaba-4e2e-ad67-73f68586e41e" xlink:href="fang-20210331.xsd#fang_DerivativeAssetNonCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_4232cb3e-db6c-4b5d-bd34-ce386072381b" xlink:to="loc_fang_DerivativeAssetNonCurrentAbstract_f8c266ee-eaba-4e2e-ad67-73f68586e41e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetFairValueGrossAssetNonCurrent_96ec02f7-0de6-4688-9375-83591fbde612" xlink:href="fang-20210331.xsd#fang_DerivativeAssetFairValueGrossAssetNonCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetNonCurrentAbstract_f8c266ee-eaba-4e2e-ad67-73f68586e41e" xlink:to="loc_fang_DerivativeAssetFairValueGrossAssetNonCurrent_96ec02f7-0de6-4688-9375-83591fbde612" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetFairValueGrossLiabilityNonCurrent_b51f9470-0f9e-4d15-ab29-8b99d5fdb95b" xlink:href="fang-20210331.xsd#fang_DerivativeAssetFairValueGrossLiabilityNonCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetNonCurrentAbstract_f8c266ee-eaba-4e2e-ad67-73f68586e41e" xlink:to="loc_fang_DerivativeAssetFairValueGrossLiabilityNonCurrent_b51f9470-0f9e-4d15-ab29-8b99d5fdb95b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_91585f55-b310-4856-98bf-abcc3a8f9aa8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetNonCurrentAbstract_f8c266ee-eaba-4e2e-ad67-73f68586e41e" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_91585f55-b310-4856-98bf-abcc3a8f9aa8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesAbstract_a688d1b5-de83-4625-98aa-b94ba6874e95" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_d44b2ee8-ddb1-4483-bd35-fb8a1d9a4c88" xlink:to="loc_us-gaap_DerivativeLiabilitiesAbstract_a688d1b5-de83-4625-98aa-b94ba6874e95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityCurrentAbstract_c5edf7f2-3d95-42ae-87a4-dec4ce272176" xlink:href="fang-20210331.xsd#fang_DerivativeLiabilityCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_a688d1b5-de83-4625-98aa-b94ba6874e95" xlink:to="loc_fang_DerivativeLiabilityCurrentAbstract_c5edf7f2-3d95-42ae-87a4-dec4ce272176" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityFairValueGrossLiabilityCurrent_6641ade1-7f3d-44d5-a10d-94c088b1dd11" xlink:href="fang-20210331.xsd#fang_DerivativeLiabilityFairValueGrossLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityCurrentAbstract_c5edf7f2-3d95-42ae-87a4-dec4ce272176" xlink:to="loc_fang_DerivativeLiabilityFairValueGrossLiabilityCurrent_6641ade1-7f3d-44d5-a10d-94c088b1dd11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityFairValueGrossAssetCurrent_df9989ab-6d29-4fd5-994a-9e04709eac95" xlink:href="fang-20210331.xsd#fang_DerivativeLiabilityFairValueGrossAssetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityCurrentAbstract_c5edf7f2-3d95-42ae-87a4-dec4ce272176" xlink:to="loc_fang_DerivativeLiabilityFairValueGrossAssetCurrent_df9989ab-6d29-4fd5-994a-9e04709eac95" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_687b6464-73d2-472a-b07b-1aa8dbebf712" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityCurrentAbstract_c5edf7f2-3d95-42ae-87a4-dec4ce272176" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_687b6464-73d2-472a-b07b-1aa8dbebf712" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityNonCurrentAbstract_d6f82850-9278-46ea-9f82-8813d3d9796d" xlink:href="fang-20210331.xsd#fang_DerivativeLiabilityNonCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_a688d1b5-de83-4625-98aa-b94ba6874e95" xlink:to="loc_fang_DerivativeLiabilityNonCurrentAbstract_d6f82850-9278-46ea-9f82-8813d3d9796d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityFairValueGrossLiabilityNoncurrent_1599ac25-863e-4489-a778-3e9fc7d81b60" xlink:href="fang-20210331.xsd#fang_DerivativeLiabilityFairValueGrossLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityNonCurrentAbstract_d6f82850-9278-46ea-9f82-8813d3d9796d" xlink:to="loc_fang_DerivativeLiabilityFairValueGrossLiabilityNoncurrent_1599ac25-863e-4489-a778-3e9fc7d81b60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityFairValueGrossAssetNoncurrent_32ecb51f-ef83-43ba-93b9-d9707c2e1c68" xlink:href="fang-20210331.xsd#fang_DerivativeLiabilityFairValueGrossAssetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityNonCurrentAbstract_d6f82850-9278-46ea-9f82-8813d3d9796d" xlink:to="loc_fang_DerivativeLiabilityFairValueGrossAssetNoncurrent_32ecb51f-ef83-43ba-93b9-d9707c2e1c68" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_e01f523e-2cc8-4727-ac3f-3ce1ff23163f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityNonCurrentAbstract_d6f82850-9278-46ea-9f82-8813d3d9796d" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_e01f523e-2cc8-4727-ac3f-3ce1ff23163f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b91658ad-1d35-4040-82cd-f7ae1184af21" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_d44b2ee8-ddb1-4483-bd35-fb8a1d9a4c88" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b91658ad-1d35-4040-82cd-f7ae1184af21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_14e6a628-996f-4ff1-91e9-3930853370bc" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b91658ad-1d35-4040-82cd-f7ae1184af21" xlink:to="loc_dei_LegalEntityAxis_14e6a628-996f-4ff1-91e9-3930853370bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_14e6a628-996f-4ff1-91e9-3930853370bc_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_14e6a628-996f-4ff1-91e9-3930853370bc" xlink:to="loc_dei_EntityDomain_14e6a628-996f-4ff1-91e9-3930853370bc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_c3e92202-bf63-4531-9b35-4332cb16027a" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_14e6a628-996f-4ff1-91e9-3930853370bc" xlink:to="loc_dei_EntityDomain_c3e92202-bf63-4531-9b35-4332cb16027a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperEnergyPartnersLPMember_7a30e16d-3574-4d7f-9c0e-c795844dd579" xlink:href="fang-20210331.xsd#fang_ViperEnergyPartnersLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_c3e92202-bf63-4531-9b35-4332cb16027a" xlink:to="loc_fang_ViperEnergyPartnersLPMember_7a30e16d-3574-4d7f-9c0e-c795844dd579" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_a6079393-7be4-413a-a18d-4a9f2cd2077b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b91658ad-1d35-4040-82cd-f7ae1184af21" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_a6079393-7be4-413a-a18d-4a9f2cd2077b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_a6079393-7be4-413a-a18d-4a9f2cd2077b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_a6079393-7be4-413a-a18d-4a9f2cd2077b" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_a6079393-7be4-413a-a18d-4a9f2cd2077b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_8148b84f-bd9e-4efe-85df-50b324ea6638" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_a6079393-7be4-413a-a18d-4a9f2cd2077b" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_8148b84f-bd9e-4efe-85df-50b324ea6638" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_1e3b59d0-11d1-482c-8f3a-bc1b33927f1c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_8148b84f-bd9e-4efe-85df-50b324ea6638" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_1e3b59d0-11d1-482c-8f3a-bc1b33927f1c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b07e0a8a-b8fa-44c7-9754-0af908712b60" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b91658ad-1d35-4040-82cd-f7ae1184af21" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b07e0a8a-b8fa-44c7-9754-0af908712b60" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b07e0a8a-b8fa-44c7-9754-0af908712b60_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b07e0a8a-b8fa-44c7-9754-0af908712b60" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b07e0a8a-b8fa-44c7-9754-0af908712b60_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3f079455-6ac1-4925-9972-8f77676b15cb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b07e0a8a-b8fa-44c7-9754-0af908712b60" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3f079455-6ac1-4925-9972-8f77676b15cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_0d6d8db7-8e38-40ce-997b-4ecea35fa933" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3f079455-6ac1-4925-9972-8f77676b15cb" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_0d6d8db7-8e38-40ce-997b-4ecea35fa933" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_1be33727-5696-4be2-b316-76ff396079e9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3f079455-6ac1-4925-9972-8f77676b15cb" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_1be33727-5696-4be2-b316-76ff396079e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_71883cb8-c4d8-4f87-8455-8b539438a083" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3f079455-6ac1-4925-9972-8f77676b15cb" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_71883cb8-c4d8-4f87-8455-8b539438a083" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_d936ba6a-0716-4b65-977f-4cfa773b4e33" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b91658ad-1d35-4040-82cd-f7ae1184af21" xlink:to="loc_us-gaap_FinancialInstrumentAxis_d936ba6a-0716-4b65-977f-4cfa773b4e33" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_d936ba6a-0716-4b65-977f-4cfa773b4e33_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_d936ba6a-0716-4b65-977f-4cfa773b4e33" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_d936ba6a-0716-4b65-977f-4cfa773b4e33_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2802ebf9-f282-4cfa-ad55-1a6441b370da" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_d936ba6a-0716-4b65-977f-4cfa773b4e33" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2802ebf9-f282-4cfa-ad55-1a6441b370da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeMember_4ec6f269-46cc-41d6-95b3-36feed71184a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2802ebf9-f282-4cfa-ad55-1a6441b370da" xlink:to="loc_us-gaap_DerivativeMember_4ec6f269-46cc-41d6-95b3-36feed71184a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTSNonrecurringMeasurementsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#FAIRVALUEMEASUREMENTSNonrecurringMeasurementsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTSNonrecurringMeasurementsDetails" xlink:type="extended" id="i282e6722534e4665b872d8a06461559d_FAIRVALUEMEASUREMENTSNonrecurringMeasurementsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01c46dbe-abcb-449c-b8ff-85c0d3f83d93" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LinesOfCreditFairValueDisclosure_15dc69f6-41a4-475c-b822-4b5f69b8c91e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LinesOfCreditFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01c46dbe-abcb-449c-b8ff-85c0d3f83d93" xlink:to="loc_us-gaap_LinesOfCreditFairValueDisclosure_15dc69f6-41a4-475c-b822-4b5f69b8c91e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansPayableFairValueDisclosure_9f8b3210-f600-4491-adce-35607f1fd44d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansPayableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01c46dbe-abcb-449c-b8ff-85c0d3f83d93" xlink:to="loc_us-gaap_LoansPayableFairValueDisclosure_9f8b3210-f600-4491-adce-35607f1fd44d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_c87e7a29-1457-440c-97df-aee2544dd258" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01c46dbe-abcb-449c-b8ff-85c0d3f83d93" xlink:to="loc_us-gaap_LongTermDebtFairValue_c87e7a29-1457-440c-97df-aee2544dd258" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_63425df9-b0b9-41b2-9aae-a25768e29872" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01c46dbe-abcb-449c-b8ff-85c0d3f83d93" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_63425df9-b0b9-41b2-9aae-a25768e29872" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fb7d3fc3-471d-4c6b-aa1f-4aaf32a96b76" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01c46dbe-abcb-449c-b8ff-85c0d3f83d93" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fb7d3fc3-471d-4c6b-aa1f-4aaf32a96b76" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_ce1fb2ae-ed60-4a57-a69f-166251ee53fc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fb7d3fc3-471d-4c6b-aa1f-4aaf32a96b76" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_ce1fb2ae-ed60-4a57-a69f-166251ee53fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ce1fb2ae-ed60-4a57-a69f-166251ee53fc_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_ce1fb2ae-ed60-4a57-a69f-166251ee53fc" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ce1fb2ae-ed60-4a57-a69f-166251ee53fc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_86ace522-0d08-4b64-affa-741292ff8445" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_ce1fb2ae-ed60-4a57-a69f-166251ee53fc" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_86ace522-0d08-4b64-affa-741292ff8445" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_92a661ec-6526-419c-95ce-f509c3a97571" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_86ace522-0d08-4b64-affa-741292ff8445" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_92a661ec-6526-419c-95ce-f509c3a97571" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_8e615b07-139f-4884-a31a-be10a003060f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_86ace522-0d08-4b64-affa-741292ff8445" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_8e615b07-139f-4884-a31a-be10a003060f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_a2d94af8-5073-4ea6-b33c-c5b5064c54c2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fb7d3fc3-471d-4c6b-aa1f-4aaf32a96b76" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_a2d94af8-5073-4ea6-b33c-c5b5064c54c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a2d94af8-5073-4ea6-b33c-c5b5064c54c2_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_a2d94af8-5073-4ea6-b33c-c5b5064c54c2" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a2d94af8-5073-4ea6-b33c-c5b5064c54c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_d2c64a68-4431-4eaf-9c9e-8024d5833a5f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_a2d94af8-5073-4ea6-b33c-c5b5064c54c2" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_d2c64a68-4431-4eaf-9c9e-8024d5833a5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_5e6c5861-cbdc-4eec-b92a-983d08ce1815" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_d2c64a68-4431-4eaf-9c9e-8024d5833a5f" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_5e6c5861-cbdc-4eec-b92a-983d08ce1815" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_e8297e5b-07b5-4d95-bf06-1e371233d0c7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_d2c64a68-4431-4eaf-9c9e-8024d5833a5f" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_e8297e5b-07b5-4d95-bf06-1e371233d0c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_3d400798-53c4-4312-b9bf-eae97d9ecc0d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_d2c64a68-4431-4eaf-9c9e-8024d5833a5f" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_3d400798-53c4-4312-b9bf-eae97d9ecc0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_1051f9d5-0ba5-480b-b905-689ec01057b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fb7d3fc3-471d-4c6b-aa1f-4aaf32a96b76" xlink:to="loc_us-gaap_DebtInstrumentAxis_1051f9d5-0ba5-480b-b905-689ec01057b9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_1051f9d5-0ba5-480b-b905-689ec01057b9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_1051f9d5-0ba5-480b-b905-689ec01057b9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_1051f9d5-0ba5-480b-b905-689ec01057b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_1051f9d5-0ba5-480b-b905-689ec01057b9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CompanyCreditFacilityMember_bb6a85c5-b576-4861-9db3-89880d20fba3" xlink:href="fang-20210331.xsd#fang_CompanyCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_CompanyCreditFacilityMember_bb6a85c5-b576-4861-9db3-89880d20fba3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4.625Notesdue2021Member_cbdbf12d-e16c-463a-8470-e46112057c31" xlink:href="fang-20210331.xsd#fang_A4.625Notesdue2021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A4.625Notesdue2021Member_cbdbf12d-e16c-463a-8470-e46112057c31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5375SeniorNotesDue2022Member_bd5f09e5-e2e5-40db-90ff-71d9f73a7c59" xlink:href="fang-20210331.xsd#fang_A5375SeniorNotesDue2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A5375SeniorNotesDue2022Member_bd5f09e5-e2e5-40db-90ff-71d9f73a7c59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A7.32MediumTermSeriesAdue2022Member_ff5d94cf-a5a7-4857-bfdb-856a23ec325f" xlink:href="fang-20210331.xsd#fang_A7.32MediumTermSeriesAdue2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A7.32MediumTermSeriesAdue2022Member_ff5d94cf-a5a7-4857-bfdb-856a23ec325f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A0900SeniorNotesDue2023Member_4b3a2fc7-3169-4321-a4a6-3901cbd190d2" xlink:href="fang-20210331.xsd#fang_A0900SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A0900SeniorNotesDue2023Member_4b3a2fc7-3169-4321-a4a6-3901cbd190d2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5250SeniorNotesDue2023Member_0fabe441-f23d-4039-b52e-4aee23855dbb" xlink:href="fang-20210331.xsd#fang_A5250SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A5250SeniorNotesDue2023Member_0fabe441-f23d-4039-b52e-4aee23855dbb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A2.875SeniorNotesdue2024Member_9fd1da09-f201-481d-b6f3-c7254328c44d" xlink:href="fang-20210331.xsd#fang_A2.875SeniorNotesdue2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A2.875SeniorNotesdue2024Member_9fd1da09-f201-481d-b6f3-c7254328c44d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4750SeniorNotesDue2025Member_7aad6ab1-5203-41ec-80f0-75ec2162faea" xlink:href="fang-20210331.xsd#fang_A4750SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A4750SeniorNotesDue2025Member_7aad6ab1-5203-41ec-80f0-75ec2162faea" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5.375SeniorNotesDue2025Member_0e143bde-7f93-4d84-b194-97ce28dbbc1b" xlink:href="fang-20210331.xsd#fang_A5.375SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A5.375SeniorNotesDue2025Member_0e143bde-7f93-4d84-b194-97ce28dbbc1b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3.250SeniorNotesDue2026Member_ddb8a952-1c6d-4fe6-bb7b-a17daa6c0ffa" xlink:href="fang-20210331.xsd#fang_A3.250SeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A3.250SeniorNotesDue2026Member_ddb8a952-1c6d-4fe6-bb7b-a17daa6c0ffa" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5625SeniorNotesDue2026Member_7305fb2e-d76e-4f53-b195-f3b61f3990d2" xlink:href="fang-20210331.xsd#fang_A5625SeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A5625SeniorNotesDue2026Member_7305fb2e-d76e-4f53-b195-f3b61f3990d2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A7.125MediumTermNotesSeriesBMember_0cb3d6fc-8a8b-4f09-8e0a-0d9300f2e884" xlink:href="fang-20210331.xsd#fang_A7.125MediumTermNotesSeriesBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A7.125MediumTermNotesSeriesBMember_0cb3d6fc-8a8b-4f09-8e0a-0d9300f2e884" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3.500SeniorNotesDue2029Member_6bb92a76-fdae-454a-b633-8619d5850904" xlink:href="fang-20210331.xsd#fang_A3.500SeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A3.500SeniorNotesDue2029Member_6bb92a76-fdae-454a-b633-8619d5850904" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3125SeniorNotesDue2031Member_1152b744-7125-499c-8682-f0b844da7c5d" xlink:href="fang-20210331.xsd#fang_A3125SeniorNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A3125SeniorNotesDue2031Member_1152b744-7125-499c-8682-f0b844da7c5d" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4400SeniorNotesDue2051Member_ee03dfc4-cd3e-4956-84eb-4dc53f7cf916" xlink:href="fang-20210331.xsd#fang_A4400SeniorNotesDue2051Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A4400SeniorNotesDue2051Member_ee03dfc4-cd3e-4956-84eb-4dc53f7cf916" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperCreditFacilityMember_f9718985-d6d7-4d49-a46b-01ba0d7599b8" xlink:href="fang-20210331.xsd#fang_ViperCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_ViperCreditFacilityMember_f9718985-d6d7-4d49-a46b-01ba0d7599b8" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5.375SeniorNotesDue2027Member_d3578377-518b-44f6-a063-b32c7bd28083" xlink:href="fang-20210331.xsd#fang_A5.375SeniorNotesDue2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A5.375SeniorNotesDue2027Member_d3578377-518b-44f6-a063-b32c7bd28083" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerCreditFacilityMember_cb36a09b-a7c1-462c-aefe-d395b9c00a8a" xlink:href="fang-20210331.xsd#fang_RattlerCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_RattlerCreditFacilityMember_cb36a09b-a7c1-462c-aefe-d395b9c00a8a" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5625SeniorNotesDue2025Member_54a730ba-d6b3-4404-8f83-d0a96ee67df8" xlink:href="fang-20210331.xsd#fang_A5625SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_A5625SeniorNotesDue2025Member_54a730ba-d6b3-4404-8f83-d0a96ee67df8" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DrillCoAgreementMember_b6885eb5-0c55-4aa7-9cef-7a8756474e7f" xlink:href="fang-20210331.xsd#fang_DrillCoAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b4659648-0041-42af-a729-736c8744ce80" xlink:to="loc_fang_DrillCoAgreementMember_b6885eb5-0c55-4aa7-9cef-7a8756474e7f" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_8c3c5d53-ce53-4285-a56d-2eb5b8cbd71b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fb7d3fc3-471d-4c6b-aa1f-4aaf32a96b76" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_8c3c5d53-ce53-4285-a56d-2eb5b8cbd71b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_8c3c5d53-ce53-4285-a56d-2eb5b8cbd71b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_8c3c5d53-ce53-4285-a56d-2eb5b8cbd71b" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_8c3c5d53-ce53-4285-a56d-2eb5b8cbd71b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_5402fe8a-7e45-414d-a4f2-57fb2619e158" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_8c3c5d53-ce53-4285-a56d-2eb5b8cbd71b" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_5402fe8a-7e45-414d-a4f2-57fb2619e158" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_ccc13032-cf88-49b3-9360-f5efde352587" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsNonrecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_5402fe8a-7e45-414d-a4f2-57fb2619e158" xlink:to="loc_us-gaap_FairValueMeasurementsNonrecurringMember_ccc13032-cf88-49b3-9360-f5efde352587" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/COMMITMENTSANDCONTINGENCIES" xlink:type="simple" xlink:href="fang-20210331.xsd#COMMITMENTSANDCONTINGENCIES"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/COMMITMENTSANDCONTINGENCIES" xlink:type="extended" id="ifad7766ca3d446f5906493a889de0514_COMMITMENTSANDCONTINGENCIES"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/COMMITMENTSANDCONTINGENCIESDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#COMMITMENTSANDCONTINGENCIESDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/COMMITMENTSANDCONTINGENCIESDetails" xlink:type="extended" id="i2438f87e59974db3a61317000661d102_COMMITMENTSANDCONTINGENCIESDetails"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SUBSEQUENTEVENTS" xlink:type="simple" xlink:href="fang-20210331.xsd#SUBSEQUENTEVENTS"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SUBSEQUENTEVENTS" xlink:type="extended" id="id5566f6080d346c68b3135ff5002714e_SUBSEQUENTEVENTS"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SUBSEQUENTEVENTSTables" xlink:type="simple" xlink:href="fang-20210331.xsd#SUBSEQUENTEVENTSTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SUBSEQUENTEVENTSTables" xlink:type="extended" id="i1acdfe1ce1dc4da295978a5982946d2b_SUBSEQUENTEVENTSTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SUBSEQUENTEVENTSNarrativesDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#SUBSEQUENTEVENTSNarrativesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SUBSEQUENTEVENTSNarrativesDetails" xlink:type="extended" id="i41999fcb00a24ddf9e6c7d1c204c2a11_SUBSEQUENTEVENTSNarrativesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_8edbc062-bc1d-4e6d-943b-ee5b2c3257d8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_8edbc062-bc1d-4e6d-943b-ee5b2c3257d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ConventionalAndNoncoreAssetsDivestedArea_3218edda-8eee-45e0-a8d6-de2b9462a65f" xlink:href="fang-20210331.xsd#fang_ConventionalAndNoncoreAssetsDivestedArea"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_fang_ConventionalAndNoncoreAssetsDivestedArea_3218edda-8eee-45e0-a8d6-de2b9462a65f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment_f8b1751c-89fc-43fa-a2cb-feb2a0389aae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment_f8b1751c-89fc-43fa-a2cb-feb2a0389aae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ConventionalAndNoncoreAssetsDivestedVolume_aa23dde7-3e0b-4a6a-9d3d-e679366f09d8" xlink:href="fang-20210331.xsd#fang_ConventionalAndNoncoreAssetsDivestedVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_fang_ConventionalAndNoncoreAssetsDivestedVolume_aa23dde7-3e0b-4a6a-9d3d-e679366f09d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ConventionalAndNoncoreAssetsDivestedEnergy_3ab84254-ec84-4965-a248-5fa6a41e3624" xlink:href="fang-20210331.xsd#fang_ConventionalAndNoncoreAssetsDivestedEnergy"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_fang_ConventionalAndNoncoreAssetsDivestedEnergy_3ab84254-ec84-4965-a248-5fa6a41e3624" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ConventionalAndNoncoreAssetsDivestedNumberOfWells_4377e1f2-1f2d-4b4d-b897-b853d445f851" xlink:href="fang-20210331.xsd#fang_ConventionalAndNoncoreAssetsDivestedNumberOfWells"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_fang_ConventionalAndNoncoreAssetsDivestedNumberOfWells_4377e1f2-1f2d-4b4d-b897-b853d445f851" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_9a0f92ad-015c-41b6-889d-c0e880bba0f4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_9a0f92ad-015c-41b6-889d-c0e880bba0f4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DisposalGroupIncludingDiscontinuedOperationConsiderationClosing_c9b1c124-d768-4cdd-8fb5-3ad4e27b5712" xlink:href="fang-20210331.xsd#fang_DisposalGroupIncludingDiscontinuedOperationConsiderationClosing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_fang_DisposalGroupIncludingDiscontinuedOperationConsiderationClosing_c9b1c124-d768-4cdd-8fb5-3ad4e27b5712" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DisposalGroupIncludingDiscontinuedOperationConsiderationFirstAnniversaryOfClosing_6f6feab6-0b15-4945-87a1-535cff6c340b" xlink:href="fang-20210331.xsd#fang_DisposalGroupIncludingDiscontinuedOperationConsiderationFirstAnniversaryOfClosing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_fang_DisposalGroupIncludingDiscontinuedOperationConsiderationFirstAnniversaryOfClosing_6f6feab6-0b15-4945-87a1-535cff6c340b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DisposalGroupIncludingDiscontinuedOperationConsiderationOverThreeYears_b69c582c-50d9-490a-8ed4-8a1d71d5f7e5" xlink:href="fang-20210331.xsd#fang_DisposalGroupIncludingDiscontinuedOperationConsiderationOverThreeYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_fang_DisposalGroupIncludingDiscontinuedOperationConsiderationOverThreeYears_b69c582c-50d9-490a-8ed4-8a1d71d5f7e5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DisposalGroupIncludingDiscontinuedOperationConsiderationPeriod_555b1dc9-cabe-483a-aa7c-00305f17ecf0" xlink:href="fang-20210331.xsd#fang_DisposalGroupIncludingDiscontinuedOperationConsiderationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_fang_DisposalGroupIncludingDiscontinuedOperationConsiderationPeriod_555b1dc9-cabe-483a-aa7c-00305f17ecf0" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_2a1637b1-a96a-4f31-b980-bb2577b34792" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_2a1637b1-a96a-4f31-b980-bb2577b34792" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_35b73600-730d-4a19-8b5a-b30523a1de12" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_9a6ed654-b546-4daa-95d4-da12e839de55" xlink:to="loc_us-gaap_SubsequentEventTable_35b73600-730d-4a19-8b5a-b30523a1de12" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_1e5e62e6-51b9-42dd-b239-474f4b318525" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_35b73600-730d-4a19-8b5a-b30523a1de12" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_1e5e62e6-51b9-42dd-b239-474f4b318525" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_1e5e62e6-51b9-42dd-b239-474f4b318525_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_1e5e62e6-51b9-42dd-b239-474f4b318525" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_1e5e62e6-51b9-42dd-b239-474f4b318525_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_69f6b5bc-b547-4da6-9c84-650551e85d8e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_1e5e62e6-51b9-42dd-b239-474f4b318525" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_69f6b5bc-b547-4da6-9c84-650551e85d8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_b8013c30-d1f8-46d9-8197-87f495e349b7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_69f6b5bc-b547-4da6-9c84-650551e85d8e" xlink:to="loc_us-gaap_SubsequentEventMember_b8013c30-d1f8-46d9-8197-87f495e349b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_346876b1-408d-424e-a5bd-9c83e5433e3b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_35b73600-730d-4a19-8b5a-b30523a1de12" xlink:to="loc_us-gaap_StatementClassOfStockAxis_346876b1-408d-424e-a5bd-9c83e5433e3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_346876b1-408d-424e-a5bd-9c83e5433e3b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_346876b1-408d-424e-a5bd-9c83e5433e3b" xlink:to="loc_us-gaap_ClassOfStockDomain_346876b1-408d-424e-a5bd-9c83e5433e3b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_9efc2783-ba07-4034-9e37-f1d39fc4e9ab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_346876b1-408d-424e-a5bd-9c83e5433e3b" xlink:to="loc_us-gaap_ClassOfStockDomain_9efc2783-ba07-4034-9e37-f1d39fc4e9ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_50ceafc3-5f5f-43ec-8ff6-095b3446dcd6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9efc2783-ba07-4034-9e37-f1d39fc4e9ab" xlink:to="loc_us-gaap_CommonStockMember_50ceafc3-5f5f-43ec-8ff6-095b3446dcd6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_22d8ea39-7def-472b-8a35-aa915afca3ee" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_35b73600-730d-4a19-8b5a-b30523a1de12" xlink:to="loc_dei_LegalEntityAxis_22d8ea39-7def-472b-8a35-aa915afca3ee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_22d8ea39-7def-472b-8a35-aa915afca3ee_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_22d8ea39-7def-472b-8a35-aa915afca3ee" xlink:to="loc_dei_EntityDomain_22d8ea39-7def-472b-8a35-aa915afca3ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_9946a2f9-6fa5-4c4c-af90-15c89b92e69a" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_22d8ea39-7def-472b-8a35-aa915afca3ee" xlink:to="loc_dei_EntityDomain_9946a2f9-6fa5-4c4c-af90-15c89b92e69a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerLLCAndAmarilloMidstreamMember_6e378248-55d9-4240-9a6e-bc72ae3e3e8d" xlink:href="fang-20210331.xsd#fang_RattlerLLCAndAmarilloMidstreamMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9946a2f9-6fa5-4c4c-af90-15c89b92e69a" xlink:to="loc_fang_RattlerLLCAndAmarilloMidstreamMember_6e378248-55d9-4240-9a6e-bc72ae3e3e8d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerLLCMember_886e7744-c446-462c-99f1-414a3ffe6194" xlink:href="fang-20210331.xsd#fang_RattlerLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_RattlerLLCAndAmarilloMidstreamMember_6e378248-55d9-4240-9a6e-bc72ae3e3e8d" xlink:to="loc_fang_RattlerLLCMember_886e7744-c446-462c-99f1-414a3ffe6194" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_3ce58639-6351-4381-afab-d3bb50e92a11" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_35b73600-730d-4a19-8b5a-b30523a1de12" xlink:to="loc_srt_StatementGeographicalAxis_3ce58639-6351-4381-afab-d3bb50e92a11" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_3ce58639-6351-4381-afab-d3bb50e92a11_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_3ce58639-6351-4381-afab-d3bb50e92a11" xlink:to="loc_srt_SegmentGeographicalDomain_3ce58639-6351-4381-afab-d3bb50e92a11_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_2aed36a4-8295-43a9-84fa-44666ed30a54" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_3ce58639-6351-4381-afab-d3bb50e92a11" xlink:to="loc_srt_SegmentGeographicalDomain_2aed36a4-8295-43a9-84fa-44666ed30a54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WillistonBasinMember_125c29cf-93f9-40a3-bd6b-2c070a32eba0" xlink:href="fang-20210331.xsd#fang_WillistonBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_2aed36a4-8295-43a9-84fa-44666ed30a54" xlink:to="loc_fang_WillistonBasinMember_125c29cf-93f9-40a3-bd6b-2c070a32eba0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SouthernMidlandBasinAndDelawareBasinMember_1c0cd1e9-8426-4ec5-b2e4-aa82205846f8" xlink:href="fang-20210331.xsd#fang_SouthernMidlandBasinAndDelawareBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_2aed36a4-8295-43a9-84fa-44666ed30a54" xlink:to="loc_fang_SouthernMidlandBasinAndDelawareBasinMember_1c0cd1e9-8426-4ec5-b2e4-aa82205846f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SouthernMidlandBasinMember_ad902c3f-7bef-4fa0-a543-e0d8c7b3ac11" xlink:href="fang-20210331.xsd#fang_SouthernMidlandBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_SouthernMidlandBasinAndDelawareBasinMember_1c0cd1e9-8426-4ec5-b2e4-aa82205846f8" xlink:to="loc_fang_SouthernMidlandBasinMember_ad902c3f-7bef-4fa0-a543-e0d8c7b3ac11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DelawareBasinMember_4647671b-bc9f-4e11-b5ea-a26faf8ce02d" xlink:href="fang-20210331.xsd#fang_DelawareBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_SouthernMidlandBasinAndDelawareBasinMember_1c0cd1e9-8426-4ec5-b2e4-aa82205846f8" xlink:to="loc_fang_DelawareBasinMember_4647671b-bc9f-4e11-b5ea-a26faf8ce02d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_0f8c435b-1d1e-4a5a-84e6-56e83b2ee255" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_35b73600-730d-4a19-8b5a-b30523a1de12" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_0f8c435b-1d1e-4a5a-84e6-56e83b2ee255" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_0f8c435b-1d1e-4a5a-84e6-56e83b2ee255_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_0f8c435b-1d1e-4a5a-84e6-56e83b2ee255" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_0f8c435b-1d1e-4a5a-84e6-56e83b2ee255_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_2d0eb1b7-99b0-4f0b-8937-54b42542d02a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_0f8c435b-1d1e-4a5a-84e6-56e83b2ee255" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_2d0eb1b7-99b0-4f0b-8937-54b42542d02a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_fb8364a3-a209-491c-a68f-de1afc43bbba" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_2d0eb1b7-99b0-4f0b-8937-54b42542d02a" xlink:to="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_fb8364a3-a209-491c-a68f-de1afc43bbba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_624fcc58-7895-4233-a526-16b00cb48849" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_35b73600-730d-4a19-8b5a-b30523a1de12" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_624fcc58-7895-4233-a526-16b00cb48849" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_624fcc58-7895-4233-a526-16b00cb48849_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_624fcc58-7895-4233-a526-16b00cb48849" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_624fcc58-7895-4233-a526-16b00cb48849_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9f9760cf-0cd5-4c4b-a9dc-ba1d5be9e5eb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_624fcc58-7895-4233-a526-16b00cb48849" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9f9760cf-0cd5-4c4b-a9dc-ba1d5be9e5eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AmarilloRattlerLLCMember_7d3f4af4-5bd3-4b50-a966-9cc14a000552" xlink:href="fang-20210331.xsd#fang_AmarilloRattlerLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9f9760cf-0cd5-4c4b-a9dc-ba1d5be9e5eb" xlink:to="loc_fang_AmarilloRattlerLLCMember_7d3f4af4-5bd3-4b50-a966-9cc14a000552" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_0f5356ac-a696-41d1-87c5-4213a1e92746" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_35b73600-730d-4a19-8b5a-b30523a1de12" xlink:to="loc_srt_StatementScenarioAxis_0f5356ac-a696-41d1-87c5-4213a1e92746" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_0f5356ac-a696-41d1-87c5-4213a1e92746_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_0f5356ac-a696-41d1-87c5-4213a1e92746" xlink:to="loc_srt_ScenarioUnspecifiedDomain_0f5356ac-a696-41d1-87c5-4213a1e92746_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_27c7fe83-b91a-4a48-9675-84f2c9176602" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_0f5356ac-a696-41d1-87c5-4213a1e92746" xlink:to="loc_srt_ScenarioUnspecifiedDomain_27c7fe83-b91a-4a48-9675-84f2c9176602" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_ba9bc9e5-cc9d-443e-b8d9-d67c17f6ed2e" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_27c7fe83-b91a-4a48-9675-84f2c9176602" xlink:to="loc_srt_ScenarioForecastMember_ba9bc9e5-cc9d-443e-b8d9-d67c17f6ed2e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SUBSEQUENTEVENTSScheduleofDerivativeContractsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#SUBSEQUENTEVENTSScheduleofDerivativeContractsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SUBSEQUENTEVENTSScheduleofDerivativeContractsDetails" xlink:type="extended" id="i162904a9e9ca4dac85fd4ea325c783c9_SUBSEQUENTEVENTSScheduleofDerivativeContractsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_543b70a9-c6ff-46ce-a4e6-07fc5cfc9834" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountVolume_03cc9b57-1e61-41fb-ab14-d93dd7b2b817" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_543b70a9-c6ff-46ce-a4e6-07fc5cfc9834" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountVolume_03cc9b57-1e61-41fb-ab14-d93dd7b2b817" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFloorPrice_f84b2029-92cf-4ffe-867f-ab0c51903159" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeFloorPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_543b70a9-c6ff-46ce-a4e6-07fc5cfc9834" xlink:to="loc_us-gaap_DerivativeFloorPrice_f84b2029-92cf-4ffe-867f-ab0c51903159" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCapPrice_6dd36141-c217-4c2f-94f5-ffca3e7d42ef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeCapPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_543b70a9-c6ff-46ce-a4e6-07fc5cfc9834" xlink:to="loc_us-gaap_DerivativeCapPrice_6dd36141-c217-4c2f-94f5-ffca3e7d42ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_1d3cae06-2663-48e2-9a6e-78055ea889f8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_543b70a9-c6ff-46ce-a4e6-07fc5cfc9834" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_1d3cae06-2663-48e2-9a6e-78055ea889f8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeWeightedAverageDifferential_70e741dc-86c4-4206-a1aa-e8c948307fc6" xlink:href="fang-20210331.xsd#fang_DerivativeWeightedAverageDifferential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_543b70a9-c6ff-46ce-a4e6-07fc5cfc9834" xlink:to="loc_fang_DerivativeWeightedAverageDifferential_70e741dc-86c4-4206-a1aa-e8c948307fc6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_7f28abd2-5ed5-49e5-9b46-723dd0283d03" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_543b70a9-c6ff-46ce-a4e6-07fc5cfc9834" xlink:to="loc_us-gaap_SubsequentEventTable_7f28abd2-5ed5-49e5-9b46-723dd0283d03" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_cfb44b2e-0e41-4d13-bc2a-38b36114ae62" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_7f28abd2-5ed5-49e5-9b46-723dd0283d03" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_cfb44b2e-0e41-4d13-bc2a-38b36114ae62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_cfb44b2e-0e41-4d13-bc2a-38b36114ae62_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_cfb44b2e-0e41-4d13-bc2a-38b36114ae62" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_cfb44b2e-0e41-4d13-bc2a-38b36114ae62_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_46e6c2e7-5307-4846-922f-e9a1bc5e0947" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_cfb44b2e-0e41-4d13-bc2a-38b36114ae62" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_46e6c2e7-5307-4846-922f-e9a1bc5e0947" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WTIHoustonArgusMember_49de2e56-edc5-412f-a477-1124faecd4da" xlink:href="fang-20210331.xsd#fang_WTIHoustonArgusMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_46e6c2e7-5307-4846-922f-e9a1bc5e0947" xlink:to="loc_fang_WTIHoustonArgusMember_49de2e56-edc5-412f-a477-1124faecd4da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BrentMember_5ebcc9a7-e125-4b9b-b13f-bb572b04536c" xlink:href="fang-20210331.xsd#fang_BrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_46e6c2e7-5307-4846-922f-e9a1bc5e0947" xlink:to="loc_fang_BrentMember_5ebcc9a7-e125-4b9b-b13f-bb572b04536c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WahaHubMember_cdd65f98-cd04-4f59-afd9-19f5859a4b5f" xlink:href="fang-20210331.xsd#fang_WahaHubMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_46e6c2e7-5307-4846-922f-e9a1bc5e0947" xlink:to="loc_fang_WahaHubMember_cdd65f98-cd04-4f59-afd9-19f5859a4b5f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyAxis_34935b33-74ab-4d82-95a7-1ca2ce3f77ff" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EnergyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_7f28abd2-5ed5-49e5-9b46-723dd0283d03" xlink:to="loc_srt_EnergyAxis_34935b33-74ab-4d82-95a7-1ca2ce3f77ff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_34935b33-74ab-4d82-95a7-1ca2ce3f77ff_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_EnergyAxis_34935b33-74ab-4d82-95a7-1ca2ce3f77ff" xlink:to="loc_srt_EnergyDomain_34935b33-74ab-4d82-95a7-1ca2ce3f77ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_fe849eb2-60b6-4e3f-9b5d-43b9d7a866d6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_EnergyAxis_34935b33-74ab-4d82-95a7-1ca2ce3f77ff" xlink:to="loc_srt_EnergyDomain_fe849eb2-60b6-4e3f-9b5d-43b9d7a866d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CrudeOilMember_d71f0d74-973f-423e-beef-27cab3d8260d" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CrudeOilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_fe849eb2-60b6-4e3f-9b5d-43b9d7a866d6" xlink:to="loc_srt_CrudeOilMember_d71f0d74-973f-423e-beef-27cab3d8260d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NaturalGasReservesMember_4755e025-9ccb-4d21-b254-b87e04beade5" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NaturalGasReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_fe849eb2-60b6-4e3f-9b5d-43b9d7a866d6" xlink:to="loc_srt_NaturalGasReservesMember_4755e025-9ccb-4d21-b254-b87e04beade5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_6b09f284-6bc3-4688-9f8c-017b3fe0069f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_7f28abd2-5ed5-49e5-9b46-723dd0283d03" xlink:to="loc_us-gaap_FinancialInstrumentAxis_6b09f284-6bc3-4688-9f8c-017b3fe0069f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6b09f284-6bc3-4688-9f8c-017b3fe0069f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_6b09f284-6bc3-4688-9f8c-017b3fe0069f" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6b09f284-6bc3-4688-9f8c-017b3fe0069f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b3026121-8a7e-46c3-af31-9a3f94f1e6cb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_6b09f284-6bc3-4688-9f8c-017b3fe0069f" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b3026121-8a7e-46c3-af31-9a3f94f1e6cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CostlessCollarMember_347a4afc-ac4a-43c5-ad11-f96eec1f3201" xlink:href="fang-20210331.xsd#fang_CostlessCollarMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b3026121-8a7e-46c3-af31-9a3f94f1e6cb" xlink:to="loc_fang_CostlessCollarMember_347a4afc-ac4a-43c5-ad11-f96eec1f3201" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BasisSwapMember_84bd3a4f-f67c-4114-ae6b-d6b4e1f66f2f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BasisSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b3026121-8a7e-46c3-af31-9a3f94f1e6cb" xlink:to="loc_us-gaap_BasisSwapMember_84bd3a4f-f67c-4114-ae6b-d6b4e1f66f2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_52b65acc-06fc-4d12-b0f8-a761fab3b107" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_7f28abd2-5ed5-49e5-9b46-723dd0283d03" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_52b65acc-06fc-4d12-b0f8-a761fab3b107" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_52b65acc-06fc-4d12-b0f8-a761fab3b107_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_52b65acc-06fc-4d12-b0f8-a761fab3b107" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_52b65acc-06fc-4d12-b0f8-a761fab3b107_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_091f9d90-17ae-4f1c-9775-d0c48e9d9747" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_52b65acc-06fc-4d12-b0f8-a761fab3b107" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_091f9d90-17ae-4f1c-9775-d0c48e9d9747" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_91a67ffa-3da8-499a-b14d-e62824f0febc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_091f9d90-17ae-4f1c-9775-d0c48e9d9747" xlink:to="loc_us-gaap_SubsequentEventMember_91a67ffa-3da8-499a-b14d-e62824f0febc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearAxis_b58dad2e-9848-40f8-830c-177fa8f3c9eb" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementYearAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_7f28abd2-5ed5-49e5-9b46-723dd0283d03" xlink:to="loc_fang_DerivativeSettlementYearAxis_b58dad2e-9848-40f8-830c-177fa8f3c9eb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearDomain_b58dad2e-9848-40f8-830c-177fa8f3c9eb_default" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fang_DerivativeSettlementYearAxis_b58dad2e-9848-40f8-830c-177fa8f3c9eb" xlink:to="loc_fang_DerivativeSettlementYearDomain_b58dad2e-9848-40f8-830c-177fa8f3c9eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearDomain_ba5e749a-fd31-4620-8a2a-8e4609a29309" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fang_DerivativeSettlementYearAxis_b58dad2e-9848-40f8-830c-177fa8f3c9eb" xlink:to="loc_fang_DerivativeSettlementYearDomain_ba5e749a-fd31-4620-8a2a-8e4609a29309" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearTwoMember_0df11979-10bc-4efd-8ba4-a984242e327e" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementYearTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementYearDomain_ba5e749a-fd31-4620-8a2a-8e4609a29309" xlink:to="loc_fang_DerivativeSettlementYearTwoMember_0df11979-10bc-4efd-8ba4-a984242e327e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthAxis_d3757c6d-9a40-48c6-896b-59583379e3ed" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_7f28abd2-5ed5-49e5-9b46-723dd0283d03" xlink:to="loc_fang_DerivativeSettlementMonthAxis_d3757c6d-9a40-48c6-896b-59583379e3ed" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthDomain_d3757c6d-9a40-48c6-896b-59583379e3ed_default" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fang_DerivativeSettlementMonthAxis_d3757c6d-9a40-48c6-896b-59583379e3ed" xlink:to="loc_fang_DerivativeSettlementMonthDomain_d3757c6d-9a40-48c6-896b-59583379e3ed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthDomain_d2a78e39-fb4e-49a3-b4d7-d49ae35788f3" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fang_DerivativeSettlementMonthAxis_d3757c6d-9a40-48c6-896b-59583379e3ed" xlink:to="loc_fang_DerivativeSettlementMonthDomain_d2a78e39-fb4e-49a3-b4d7-d49ae35788f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthSevenMember_032d7668-7177-43c3-b0ee-c015582e90a6" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthSevenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_d2a78e39-fb4e-49a3-b4d7-d49ae35788f3" xlink:to="loc_fang_DerivativeSettlementMonthSevenMember_032d7668-7177-43c3-b0ee-c015582e90a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthSixMember_f8e8b542-a302-438d-928e-04f4aa50ae12" xlink:href="fang-20210331.xsd#fang_DerivativeSettlementMonthSixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_d2a78e39-fb4e-49a3-b4d7-d49ae35788f3" xlink:to="loc_fang_DerivativeSettlementMonthSixMember_f8e8b542-a302-438d-928e-04f4aa50ae12" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SEGMENTINFORMATION" xlink:type="simple" xlink:href="fang-20210331.xsd#SEGMENTINFORMATION"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SEGMENTINFORMATION" xlink:type="extended" id="i60dbf3b232c3463aa0af17424feb53d6_SEGMENTINFORMATION"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SEGMENTINFORMATIONTables" xlink:type="simple" xlink:href="fang-20210331.xsd#SEGMENTINFORMATIONTables"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SEGMENTINFORMATIONTables" xlink:type="extended" id="i6ddf2779e55343ee8f2fb9a33ddf5833_SEGMENTINFORMATIONTables"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SEGMENTINFORMATIONAdditionalInformationDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#SEGMENTINFORMATIONAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SEGMENTINFORMATIONAdditionalInformationDetails" xlink:type="extended" id="i4fe609ee451a4f55b9dbb74ca18b6956_SEGMENTINFORMATIONAdditionalInformationDetails"/>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SEGMENTINFORMATIONSummaryofBusinessSegmentsDetails" xlink:type="simple" xlink:href="fang-20210331.xsd#SEGMENTINFORMATIONSummaryofBusinessSegmentsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SEGMENTINFORMATIONSummaryofBusinessSegmentsDetails" xlink:type="extended" id="iddedb04615f047558234fc7cb3d0e36d_SEGMENTINFORMATIONSummaryofBusinessSegmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_bba8cb51-79cb-4ad0-8f8e-c0ac50e076b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_Revenues_bba8cb51-79cb-4ad0-8f8e-c0ac50e076b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_2b14f3ef-8e41-4b6c-912b-76808159a4c9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_2b14f3ef-8e41-4b6c-912b-76808159a4c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ImpairmentOfMidstreamAssets_45d350db-9308-4649-ac11-e21b3ce35034" xlink:href="fang-20210331.xsd#fang_ImpairmentOfMidstreamAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_fang_ImpairmentOfMidstreamAssets_45d350db-9308-4649-ac11-e21b3ce35034" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfOilAndGasProperties_9479b880-51a1-42e9-b0f0-94b81d827778" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOfOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_ImpairmentOfOilAndGasProperties_9479b880-51a1-42e9-b0f0-94b81d827778" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_1e1fafea-7fb1-4e64-865b-9fa055f04d4e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_OperatingIncomeLoss_1e1fafea-7fb1-4e64-865b-9fa055f04d4e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_8beef232-da11-4156-a91c-d2bbb1aa366a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_8beef232-da11-4156-a91c-d2bbb1aa366a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_03b18374-f184-448b-8100-c18b7f1aaab1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_03b18374-f184-448b-8100-c18b7f1aaab1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_682d1295-3855-4684-a7c0-19426a8feb51" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_682d1295-3855-4684-a7c0-19426a8feb51" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_d5419241-dd65-4845-ab99-feefdfe55f83" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_d5419241-dd65-4845-ab99-feefdfe55f83" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_db05b88b-c528-45db-9dc2-306d078e15a2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_NetIncomeLoss_db05b88b-c528-45db-9dc2-306d078e15a2" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_bcd7b902-052f-4bcd-8ec7-c8d462823914" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_Assets_bcd7b902-052f-4bcd-8ec7-c8d462823914" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0a007341-7ed4-407f-a4c7-b77b91d577ad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_08cd19c4-76c7-43b0-aad7-7e0184eedae9" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0a007341-7ed4-407f-a4c7-b77b91d577ad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_9974835b-50fa-4119-b79b-796ea04ab718" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0a007341-7ed4-407f-a4c7-b77b91d577ad" xlink:to="loc_srt_ConsolidationItemsAxis_9974835b-50fa-4119-b79b-796ea04ab718" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_9974835b-50fa-4119-b79b-796ea04ab718_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_9974835b-50fa-4119-b79b-796ea04ab718" xlink:to="loc_srt_ConsolidationItemsDomain_9974835b-50fa-4119-b79b-796ea04ab718_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_5377351d-524f-468a-9cdb-e42c5441001a" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_9974835b-50fa-4119-b79b-796ea04ab718" xlink:to="loc_srt_ConsolidationItemsDomain_5377351d-524f-468a-9cdb-e42c5441001a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_9bac7f31-0158-418a-b5a9-b04d385e9477" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_5377351d-524f-468a-9cdb-e42c5441001a" xlink:to="loc_us-gaap_OperatingSegmentsMember_9bac7f31-0158-418a-b5a9-b04d385e9477" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_71d6d35f-b20c-4925-870f-ed825a2e6a57" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_5377351d-524f-468a-9cdb-e42c5441001a" xlink:to="loc_us-gaap_IntersegmentEliminationMember_71d6d35f-b20c-4925-870f-ed825a2e6a57" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_16e02aa5-b551-41fe-be5b-a47be34c9d13" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0a007341-7ed4-407f-a4c7-b77b91d577ad" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_16e02aa5-b551-41fe-be5b-a47be34c9d13" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_16e02aa5-b551-41fe-be5b-a47be34c9d13_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_16e02aa5-b551-41fe-be5b-a47be34c9d13" xlink:to="loc_us-gaap_SegmentDomain_16e02aa5-b551-41fe-be5b-a47be34c9d13_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_2982bd0a-e440-4277-9277-a460a854f629" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_16e02aa5-b551-41fe-be5b-a47be34c9d13" xlink:to="loc_us-gaap_SegmentDomain_2982bd0a-e440-4277-9277-a460a854f629" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_UpstreamServicesSegmentMember_4a617bde-d482-4168-8f0e-aaec882bfcef" xlink:href="fang-20210331.xsd#fang_UpstreamServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2982bd0a-e440-4277-9277-a460a854f629" xlink:to="loc_fang_UpstreamServicesSegmentMember_4a617bde-d482-4168-8f0e-aaec882bfcef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_MidstreamOperationsSegmentMember_27291a73-532b-47fd-adae-1bf63febc522" xlink:href="fang-20210331.xsd#fang_MidstreamOperationsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2982bd0a-e440-4277-9277-a460a854f629" xlink:to="loc_fang_MidstreamOperationsSegmentMember_27291a73-532b-47fd-adae-1bf63febc522" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
