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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:131ddf4f-6b38-4878-918a-ba0977e88c97,g:cc605143-9c4c-427f-937f-13f285c3cb0c-->
<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/CondensedConsolidatedStatementsofOperationsUnaudited" xlink:type="simple" xlink:href="fang-20210930.xsd#CondensedConsolidatedStatementsofOperationsUnaudited"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CondensedConsolidatedStatementsofOperationsUnaudited" xlink:type="extended" id="i95a8e042a7e04d67b68ffd91c078d4cc_CondensedConsolidatedStatementsofOperationsUnaudited">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_3aef3e65-4feb-4408-8b80-d9fec5f6a8bc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_RevenuesAbstract_3aef3e65-4feb-4408-8b80-d9fec5f6a8bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_1c36698e-63e5-4e51-a203-d1cf4d87e9e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_3aef3e65-4feb-4408-8b80-d9fec5f6a8bc" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_1c36698e-63e5-4e51-a203-d1cf4d87e9e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueNotFromContractWithCustomer_3902dad7-ca1d-4e6c-a30e-3f05763e8f22" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueNotFromContractWithCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_3aef3e65-4feb-4408-8b80-d9fec5f6a8bc" xlink:to="loc_us-gaap_RevenueNotFromContractWithCustomer_3902dad7-ca1d-4e6c-a30e-3f05763e8f22" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_251da377-86fb-4b03-b013-fb578c842bf7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_3aef3e65-4feb-4408-8b80-d9fec5f6a8bc" xlink:to="loc_us-gaap_Revenues_251da377-86fb-4b03-b013-fb578c842bf7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseExpense_321e3204-2fdf-4110-93ad-cb9adc0ce07b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:to="loc_us-gaap_OperatingLeaseExpense_321e3204-2fdf-4110-93ad-cb9adc0ce07b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductionTaxExpense_e326d656-a9fa-4e6c-9dc2-91fac0a30be2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductionTaxExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:to="loc_us-gaap_ProductionTaxExpense_e326d656-a9fa-4e6c-9dc2-91fac0a30be2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_88f93b0c-dd26-449a-99fa-e48b4371786b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_88f93b0c-dd26-449a-99fa-e48b4371786b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_062189a5-732c-4454-8237-0cc53c1187f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_062189a5-732c-4454-8237-0cc53c1187f4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfOilAndGasProperties_4898b3fe-5dc8-4795-b8a0-04c2c5cc6ff6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:to="loc_us-gaap_ImpairmentOfOilAndGasProperties_4898b3fe-5dc8-4795-b8a0-04c2c5cc6ff6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_750555de-3d04-4241-8d1e-3ee6c1ddec08" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_750555de-3d04-4241-8d1e-3ee6c1ddec08" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_Mergerandintegrationexpense_c8e1185a-0205-4be9-afef-2711e8c5a572" xlink:href="fang-20210930.xsd#fang_Mergerandintegrationexpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:to="loc_fang_Mergerandintegrationexpense_c8e1185a-0205-4be9-afef-2711e8c5a572" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_e3ab68a3-5fb5-43eb-a7b5-55f3012ccdbf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_e3ab68a3-5fb5-43eb-a7b5-55f3012ccdbf" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_17fb4e9b-4939-469a-9beb-941fb41477fe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_ebb576ed-b58f-4237-9d8d-5dc31097c046" xlink:to="loc_us-gaap_CostsAndExpenses_17fb4e9b-4939-469a-9beb-941fb41477fe" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_b0835872-3836-43df-8fce-bf43ae324f40" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_OperatingIncomeLoss_b0835872-3836-43df-8fce-bf43ae324f40" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_d6dad377-e00b-4a9c-8bfd-8d3902f3371f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_OtherIncomeAndExpensesAbstract_d6dad377-e00b-4a9c-8bfd-8d3902f3371f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_e9683b87-b2c2-46a3-93a9-c93b75cd9b8c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_d6dad377-e00b-4a9c-8bfd-8d3902f3371f" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_e9683b87-b2c2-46a3-93a9-c93b75cd9b8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_OtherNonoperatingIncomeNet_dfc5e076-b165-4b55-b600-6a80207df6ec" xlink:href="fang-20210930.xsd#fang_OtherNonoperatingIncomeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_d6dad377-e00b-4a9c-8bfd-8d3902f3371f" xlink:to="loc_fang_OtherNonoperatingIncomeNet_dfc5e076-b165-4b55-b600-6a80207df6ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_ceab9617-130a-49fe-9591-731437205107" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_d6dad377-e00b-4a9c-8bfd-8d3902f3371f" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_ceab9617-130a-49fe-9591-731437205107" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_156f14bd-c9a4-42a3-a00e-cc99318b6a3a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_d6dad377-e00b-4a9c-8bfd-8d3902f3371f" xlink:to="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_156f14bd-c9a4-42a3-a00e-cc99318b6a3a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_d0d04e69-10a7-4383-acd3-733b5681db9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_d6dad377-e00b-4a9c-8bfd-8d3902f3371f" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_d0d04e69-10a7-4383-acd3-733b5681db9d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_e744fd0a-63d8-4fd3-9716-5f02928645dc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_d6dad377-e00b-4a9c-8bfd-8d3902f3371f" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_e744fd0a-63d8-4fd3-9716-5f02928645dc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_0cd8d867-d822-40a3-ba6a-3d5d916cdfef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_d6dad377-e00b-4a9c-8bfd-8d3902f3371f" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_0cd8d867-d822-40a3-ba6a-3d5d916cdfef" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_f5e6172e-a19e-4566-ace7-b0934f6f3b81" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_f5e6172e-a19e-4566-ace7-b0934f6f3b81" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_67df17ef-c202-4137-ab5b-e387e42e3ab9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_67df17ef-c202-4137-ab5b-e387e42e3ab9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_f390f3d6-2a9b-44e2-8631-79994732ddb2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_ProfitLoss_f390f3d6-2a9b-44e2-8631-79994732ddb2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_d2ecd5f0-fbca-4006-807b-eb7f4b0b15ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_d2ecd5f0-fbca-4006-807b-eb7f4b0b15ea" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_fb081a6d-957f-49e3-9fc9-b3baea526856" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_NetIncomeLoss_fb081a6d-957f-49e3-9fc9-b3baea526856" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_b97aeef3-5865-4016-a633-e0140af5b6a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_EarningsPerShareAbstract_b97aeef3-5865-4016-a633-e0140af5b6a7" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_8102f1d9-b676-4fae-9859-bb723fb4b92f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_b97aeef3-5865-4016-a633-e0140af5b6a7" xlink:to="loc_us-gaap_EarningsPerShareBasic_8102f1d9-b676-4fae-9859-bb723fb4b92f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_b4dffed2-e75c-48a4-af30-a4b20184a7de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_b97aeef3-5865-4016-a633-e0140af5b6a7" xlink:to="loc_us-gaap_EarningsPerShareDiluted_b4dffed2-e75c-48a4-af30-a4b20184a7de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_4a8cd336-ad4f-4452-84f3-aa7bbfe9b7e2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_4a8cd336-ad4f-4452-84f3-aa7bbfe9b7e2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8b731c60-5100-47f1-8adc-0e083f9da43d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_4a8cd336-ad4f-4452-84f3-aa7bbfe9b7e2" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8b731c60-5100-47f1-8adc-0e083f9da43d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_59ea3537-23bb-4f91-83a1-26e3d0e504b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_4a8cd336-ad4f-4452-84f3-aa7bbfe9b7e2" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_59ea3537-23bb-4f91-83a1-26e3d0e504b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_049ec4d3-8dc4-40b3-8c6d-256f85439504" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_049ec4d3-8dc4-40b3-8c6d-256f85439504" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_654f3dc7-9c32-44c1-ae8a-8c046fa50f3d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_175c2e6e-8efc-4c91-b96c-36975359613d" xlink:to="loc_us-gaap_StatementTable_654f3dc7-9c32-44c1-ae8a-8c046fa50f3d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_f20d06b3-25e2-4faf-b511-f6f35bd819c5" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_654f3dc7-9c32-44c1-ae8a-8c046fa50f3d" xlink:to="loc_srt_ProductOrServiceAxis_f20d06b3-25e2-4faf-b511-f6f35bd819c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_f20d06b3-25e2-4faf-b511-f6f35bd819c5_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_f20d06b3-25e2-4faf-b511-f6f35bd819c5" xlink:to="loc_srt_ProductsAndServicesDomain_f20d06b3-25e2-4faf-b511-f6f35bd819c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_a7487577-7566-414d-99da-0f279bdd5b02" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_f20d06b3-25e2-4faf-b511-f6f35bd819c5" xlink:to="loc_srt_ProductsAndServicesDomain_a7487577-7566-414d-99da-0f279bdd5b02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_OilExplorationandProductionMember_81834d87-49fb-4cc1-a6fc-44beecaddc95" xlink:href="fang-20210930.xsd#fang_OilExplorationandProductionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a7487577-7566-414d-99da-0f279bdd5b02" xlink:to="loc_fang_OilExplorationandProductionMember_81834d87-49fb-4cc1-a6fc-44beecaddc95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasProductionMember_6f3e973d-a950-4353-9da8-c071c6cfe23e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NaturalGasProductionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a7487577-7566-414d-99da-0f279bdd5b02" xlink:to="loc_us-gaap_NaturalGasProductionMember_6f3e973d-a950-4353-9da8-c071c6cfe23e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NaturalGasLiquidsProductionMember_937995e0-a558-410c-97c4-9265cdd676f0" xlink:href="fang-20210930.xsd#fang_NaturalGasLiquidsProductionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a7487577-7566-414d-99da-0f279bdd5b02" xlink:to="loc_fang_NaturalGasLiquidsProductionMember_937995e0-a558-410c-97c4-9265cdd676f0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasMidstreamMember_abc80d30-5dc9-44ab-93d1-9d0289677d40" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NaturalGasMidstreamMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a7487577-7566-414d-99da-0f279bdd5b02" xlink:to="loc_us-gaap_NaturalGasMidstreamMember_abc80d30-5dc9-44ab-93d1-9d0289677d40" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasGatheringTransportationMarketingAndProcessingMember_ab76be37-2ace-41b4-87a8-bb114e41c4fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NaturalGasGatheringTransportationMarketingAndProcessingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a7487577-7566-414d-99da-0f279bdd5b02" xlink:to="loc_us-gaap_NaturalGasGatheringTransportationMarketingAndProcessingMember_ab76be37-2ace-41b4-87a8-bb114e41c4fb" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CondensedConsolidatedStatementsofStockholdersEquityUnaudited" xlink:type="simple" xlink:href="fang-20210930.xsd#CondensedConsolidatedStatementsofStockholdersEquityUnaudited"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CondensedConsolidatedStatementsofStockholdersEquityUnaudited" xlink:type="extended" id="ief51bbd5673e4de79702e19694a3e0eb_CondensedConsolidatedStatementsofStockholdersEquityUnaudited">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_160f2466-e328-4014-9c43-48cf921a707e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_160f2466-e328-4014-9c43-48cf921a707e" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_476559b1-1e0e-461e-8eb2-fcc605ebcc6e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_476559b1-1e0e-461e-8eb2-fcc605ebcc6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_d47cfe06-23cc-4350-b6c3-2a30c3e40eb4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_d47cfe06-23cc-4350-b6c3-2a30c3e40eb4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NoncontrollingInterestIncreasefromUnitbasedCompensation_5f4ac917-fdf1-4fe9-ad22-2f46bdead21b" xlink:href="fang-20210930.xsd#fang_NoncontrollingInterestIncreasefromUnitbasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_fang_NoncontrollingInterestIncreasefromUnitbasedCompensation_5f4ac917-fdf1-4fe9-ad22-2f46bdead21b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_LimitedPartnersCapitalAccountDistributionEquivalentRightsPayments_5a193e0a-e319-4e3e-becc-8678e21743bf" xlink:href="fang-20210930.xsd#fang_LimitedPartnersCapitalAccountDistributionEquivalentRightsPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_fang_LimitedPartnersCapitalAccountDistributionEquivalentRightsPayments_5a193e0a-e319-4e3e-becc-8678e21743bf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_b637e1e9-cb31-44a6-a0c0-e4bcc31bef9e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_b637e1e9-cb31-44a6-a0c0-e4bcc31bef9e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_6ba7af17-9973-43c0-91d2-341c21fed781" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_6ba7af17-9973-43c0-91d2-341c21fed781" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_25e0a7ee-a752-42bd-bdbc-f5d41b089c18" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_25e0a7ee-a752-42bd-bdbc-f5d41b089c18" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AdjustmentToAdditionalPaidInCapitalRepurchasedSharesForTaxWithholding_ed7b668c-7cc8-4e3a-81e8-e6db583a6633" xlink:href="fang-20210930.xsd#fang_AdjustmentToAdditionalPaidInCapitalRepurchasedSharesForTaxWithholding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_fang_AdjustmentToAdditionalPaidInCapitalRepurchasedSharesForTaxWithholding_ed7b668c-7cc8-4e3a-81e8-e6db583a6633" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_27717b25-efb3-47aa-8ad6-df275fe1185e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_27717b25-efb3-47aa-8ad6-df275fe1185e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_71429d44-50fa-4c50-ac2b-98a4dc9345af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_71429d44-50fa-4c50-ac2b-98a4dc9345af" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_StockUnitsRepurchasedDuringPeriodValue_c6ef3b6d-68fa-4e6a-a0b9-42c552f5ed03" xlink:href="fang-20210930.xsd#fang_StockUnitsRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_fang_StockUnitsRepurchasedDuringPeriodValue_c6ef3b6d-68fa-4e6a-a0b9-42c552f5ed03" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_34a71ffa-d864-4e12-950f-8e623e9b40cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_34a71ffa-d864-4e12-950f-8e623e9b40cc" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_b47cd4d8-dfc3-4d55-a5a8-f6315ae4a4ca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_DividendsCommonStockCash_b47cd4d8-dfc3-4d55-a5a8-f6315ae4a4ca" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_5136b79f-ceab-46a6-8aef-aff730c861fe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_5136b79f-ceab-46a6-8aef-aff730c861fe" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_5768e09d-fcda-41ae-a731-392fa22c2d21" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_5768e09d-fcda-41ae-a731-392fa22c2d21" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet_2fbaef60-1ee5-4630-bb52-fa235554269e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet_2fbaef60-1ee5-4630-bb52-fa235554269e" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_6dba0337-eecd-48d9-88e4-4cbac8ca386f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_732930e4-8674-4f35-8964-2190e503ddf6" xlink:to="loc_us-gaap_ProfitLoss_6dba0337-eecd-48d9-88e4-4cbac8ca386f" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_bec5f0fb-c32a-4653-907f-ebf9cac96485" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e86a00a1-c784-4025-aad7-644719c51224" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_dd0e9196-666b-4ec8-951f-22ee29c23cf1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_160f2466-e328-4014-9c43-48cf921a707e" xlink:to="loc_us-gaap_StatementTable_dd0e9196-666b-4ec8-951f-22ee29c23cf1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_925cc0b6-8394-48cb-8214-7f7f2f726b61" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_dd0e9196-666b-4ec8-951f-22ee29c23cf1" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_925cc0b6-8394-48cb-8214-7f7f2f726b61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_925cc0b6-8394-48cb-8214-7f7f2f726b61_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_925cc0b6-8394-48cb-8214-7f7f2f726b61" xlink:to="loc_us-gaap_EquityComponentDomain_925cc0b6-8394-48cb-8214-7f7f2f726b61_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_d076ee86-53c6-4890-8c47-6c9cf27319b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_925cc0b6-8394-48cb-8214-7f7f2f726b61" xlink:to="loc_us-gaap_EquityComponentDomain_d076ee86-53c6-4890-8c47-6c9cf27319b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_228ed06b-5f63-44fe-9bbf-d078348f8f2a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_d076ee86-53c6-4890-8c47-6c9cf27319b6" xlink:to="loc_us-gaap_CommonStockMember_228ed06b-5f63-44fe-9bbf-d078348f8f2a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_56fe7647-8fa6-4dcd-9565-11207bb0c637" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_d076ee86-53c6-4890-8c47-6c9cf27319b6" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_56fe7647-8fa6-4dcd-9565-11207bb0c637" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_ee9b4f28-32b0-416d-b02f-be16ef8cdcee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_d076ee86-53c6-4890-8c47-6c9cf27319b6" xlink:to="loc_us-gaap_RetainedEarningsMember_ee9b4f28-32b0-416d-b02f-be16ef8cdcee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_dc3fc403-2126-466e-aa1f-143a87d4260e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_d076ee86-53c6-4890-8c47-6c9cf27319b6" xlink:to="loc_us-gaap_NoncontrollingInterestMember_dc3fc403-2126-466e-aa1f-143a87d4260e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATIONDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATIONDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATIONDetails" xlink:type="extended" id="i59469f484c894f618a53ee181d9597df_DESCRIPTIONOFTHEBUSINESSANDBASISOFPRESENTATIONDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestLineItems_466f4783-642d-4cf0-8ac1-a62541f2d63b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_83d0acb0-28d2-4ace-9e83-9f404094e1d5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_466f4783-642d-4cf0-8ac1-a62541f2d63b" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_83d0acb0-28d2-4ace-9e83-9f404094e1d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestTable_01aa0f7d-8b0c-4801-8403-084246b3eb30" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MinorityInterestLineItems_466f4783-642d-4cf0-8ac1-a62541f2d63b" xlink:to="loc_us-gaap_MinorityInterestTable_01aa0f7d-8b0c-4801-8403-084246b3eb30" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_cc4d8fa8-70b5-4c3c-8ef3-a56160caa5bb" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_01aa0f7d-8b0c-4801-8403-084246b3eb30" xlink:to="loc_srt_OwnershipAxis_cc4d8fa8-70b5-4c3c-8ef3-a56160caa5bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_cc4d8fa8-70b5-4c3c-8ef3-a56160caa5bb_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_cc4d8fa8-70b5-4c3c-8ef3-a56160caa5bb" xlink:to="loc_srt_OwnershipDomain_cc4d8fa8-70b5-4c3c-8ef3-a56160caa5bb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_10761327-68c7-4a30-bd6a-3df06cbfb757" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_cc4d8fa8-70b5-4c3c-8ef3-a56160caa5bb" xlink:to="loc_srt_OwnershipDomain_10761327-68c7-4a30-bd6a-3df06cbfb757" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperEnergyPartnersLPMember_e924703a-d3c9-416e-afb6-582fb619535a" xlink:href="fang-20210930.xsd#fang_ViperEnergyPartnersLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_10761327-68c7-4a30-bd6a-3df06cbfb757" xlink:to="loc_fang_ViperEnergyPartnersLPMember_e924703a-d3c9-416e-afb6-582fb619535a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerMIdstreamLPMember_78b1119d-ea2c-4bee-992c-4751f7c6ea01" xlink:href="fang-20210930.xsd#fang_RattlerMIdstreamLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_10761327-68c7-4a30-bd6a-3df06cbfb757" xlink:to="loc_fang_RattlerMIdstreamLPMember_78b1119d-ea2c-4bee-992c-4751f7c6ea01" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERSDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#REVENUEFROMCONTRACTSWITHCUSTOMERSDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/REVENUEFROMCONTRACTSWITHCUSTOMERSDetails" xlink:type="extended" id="if53ef23b52074a6495a0a65e5ae43cd7_REVENUEFROMCONTRACTSWITHCUSTOMERSDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_99073e00-e8ef-4ff9-a0f0-602bb300ad1d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_15a12dbf-4bb2-45a7-9e7c-1e3d1c7e157d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_99073e00-e8ef-4ff9-a0f0-602bb300ad1d" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_15a12dbf-4bb2-45a7-9e7c-1e3d1c7e157d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_4f8c020d-cf5c-48a7-8a12-d4bfc44c1cfa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_99073e00-e8ef-4ff9-a0f0-602bb300ad1d" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_4f8c020d-cf5c-48a7-8a12-d4bfc44c1cfa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_37d46686-ba79-42fb-940b-41057a2aaecc" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_4f8c020d-cf5c-48a7-8a12-d4bfc44c1cfa" xlink:to="loc_srt_ProductOrServiceAxis_37d46686-ba79-42fb-940b-41057a2aaecc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_37d46686-ba79-42fb-940b-41057a2aaecc_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_37d46686-ba79-42fb-940b-41057a2aaecc" xlink:to="loc_srt_ProductsAndServicesDomain_37d46686-ba79-42fb-940b-41057a2aaecc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_78db0932-50c7-420e-b4cc-6ab01b6616d4" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_37d46686-ba79-42fb-940b-41057a2aaecc" xlink:to="loc_srt_ProductsAndServicesDomain_78db0932-50c7-420e-b4cc-6ab01b6616d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_OilIncomeMember_949eab1b-b406-42da-b6e1-4a7a8d9b869e" xlink:href="fang-20210930.xsd#fang_OilIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_78db0932-50c7-420e-b4cc-6ab01b6616d4" xlink:to="loc_fang_OilIncomeMember_949eab1b-b406-42da-b6e1-4a7a8d9b869e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NaturalGasIncomeMember_9545d457-8bce-4fd4-99c2-82ff41d83c87" xlink:href="fang-20210930.xsd#fang_NaturalGasIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_78db0932-50c7-420e-b4cc-6ab01b6616d4" xlink:to="loc_fang_NaturalGasIncomeMember_9545d457-8bce-4fd4-99c2-82ff41d83c87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NaturalGasLiquidsIncomeMember_d1dd861b-5687-4f14-a014-2159b2df1fcd" xlink:href="fang-20210930.xsd#fang_NaturalGasLiquidsIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_78db0932-50c7-420e-b4cc-6ab01b6616d4" xlink:to="loc_fang_NaturalGasLiquidsIncomeMember_d1dd861b-5687-4f14-a014-2159b2df1fcd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_d08f7049-e02d-4d5c-9577-083c90f51830" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_4f8c020d-cf5c-48a7-8a12-d4bfc44c1cfa" xlink:to="loc_srt_MajorCustomersAxis_d08f7049-e02d-4d5c-9577-083c90f51830" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_d08f7049-e02d-4d5c-9577-083c90f51830_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_d08f7049-e02d-4d5c-9577-083c90f51830" xlink:to="loc_srt_NameOfMajorCustomerDomain_d08f7049-e02d-4d5c-9577-083c90f51830_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_626fd6f8-8ab0-4129-a3a3-28da77a87a03" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_d08f7049-e02d-4d5c-9577-083c90f51830" xlink:to="loc_srt_NameOfMajorCustomerDomain_626fd6f8-8ab0-4129-a3a3-28da77a87a03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_MidlandBasinMember_0dbf9551-1ac0-4636-bfa2-3d9d5a0f37a0" xlink:href="fang-20210930.xsd#fang_MidlandBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_626fd6f8-8ab0-4129-a3a3-28da77a87a03" xlink:to="loc_fang_MidlandBasinMember_0dbf9551-1ac0-4636-bfa2-3d9d5a0f37a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DelawareBasinMember_5581a040-f315-41b7-b5c4-12956e20e521" xlink:href="fang-20210930.xsd#fang_DelawareBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_626fd6f8-8ab0-4129-a3a3-28da77a87a03" xlink:to="loc_fang_DelawareBasinMember_5581a040-f315-41b7-b5c4-12956e20e521" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCustomerMember_15fc7901-02b3-474a-8b83-fec33b1301e6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_626fd6f8-8ab0-4129-a3a3-28da77a87a03" xlink:to="loc_us-gaap_OtherCustomerMember_15fc7901-02b3-474a-8b83-fec33b1301e6" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESNarrativeDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#ACQUISITIONSANDDIVESTITURESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESNarrativeDetails" xlink:type="extended" id="i4244878c0fad4e9ea838fd2f19748343_ACQUISITIONSANDDIVESTITURESNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AreaOfLand_f25f6075-ff98-43db-b599-065be76501ae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AreaOfLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_us-gaap_AreaOfLand_f25f6075-ff98-43db-b599-065be76501ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_78eaf64d-d26f-4e1f-b876-aa6c2d256707" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_78eaf64d-d26f-4e1f-b876-aa6c2d256707" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_PaymentsForAssetAcquisitions_3a3e6e78-6523-47f6-9450-ea1410dbe655" xlink:href="fang-20210930.xsd#fang_PaymentsForAssetAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_fang_PaymentsForAssetAcquisitions_3a3e6e78-6523-47f6-9450-ea1410dbe655" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionNumberOfAdditionalWells_aa331a0b-97e1-47a8-ad67-94582d599285" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionNumberOfAdditionalWells"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_fang_AssetAcquisitionNumberOfAdditionalWells_aa331a0b-97e1-47a8-ad67-94582d599285" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves_81b5c4cb-98a5-4ab0-a461-6f501e22504e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves_81b5c4cb-98a5-4ab0-a461-6f501e22504e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsIncurredAcquisitionOfUnprovedOilAndGasProperties_03a1df64-643b-4cc4-91c7-48012a07c6d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostsIncurredAcquisitionOfUnprovedOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_us-gaap_CostsIncurredAcquisitionOfUnprovedOilAndGasProperties_03a1df64-643b-4cc4-91c7-48012a07c6d2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_b56e6d63-6e7f-4588-a91d-bfb286942245" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_b56e6d63-6e7f-4588-a91d-bfb286942245" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationProFormaInformationDirectOperatingExpensessinceAcquisitionDateActual_0b2ccc8c-8930-4c5c-91a9-a6ebb3e283cf" xlink:href="fang-20210930.xsd#fang_BusinessCombinationProFormaInformationDirectOperatingExpensessinceAcquisitionDateActual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_fang_BusinessCombinationProFormaInformationDirectOperatingExpensessinceAcquisitionDateActual_0b2ccc8c-8930-4c5c-91a9-a6ebb3e283cf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CombinedTierOneAcres_9bf5cdad-1530-4f33-8883-132ec6344cc6" xlink:href="fang-20210930.xsd#fang_CombinedTierOneAcres"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_fang_CombinedTierOneAcres_9bf5cdad-1530-4f33-8883-132ec6344cc6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare_2a240406-f248-4eac-bbb9-cba00ca2e0d5" xlink:href="fang-20210930.xsd#fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare_2a240406-f248-4eac-bbb9-cba00ca2e0d5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_86ba9492-43bd-41e0-8926-dd84115fc41d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_86ba9492-43bd-41e0-8926-dd84115fc41d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_291865f3-6dc3-40c0-b30d-8639e9d45e3d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_291865f3-6dc3-40c0-b30d-8639e9d45e3d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationAcquisitionRelatedCostsIncurredByAquiree_fd385b0d-e587-44b3-b3b5-1cb84422f476" xlink:href="fang-20210930.xsd#fang_BusinessCombinationAcquisitionRelatedCostsIncurredByAquiree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_fang_BusinessCombinationAcquisitionRelatedCostsIncurredByAquiree_fd385b0d-e587-44b3-b3b5-1cb84422f476" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_441abc5f-f11b-4713-8c56-f5b62fe1d546" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_5a56d49c-5f41-4758-b05e-2ab4abf2e799" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_441abc5f-f11b-4713-8c56-f5b62fe1d546" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_654004bd-35eb-49dd-9e18-acb23f61aba8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_441abc5f-f11b-4713-8c56-f5b62fe1d546" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_654004bd-35eb-49dd-9e18-acb23f61aba8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_654004bd-35eb-49dd-9e18-acb23f61aba8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_654004bd-35eb-49dd-9e18-acb23f61aba8" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_654004bd-35eb-49dd-9e18-acb23f61aba8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4e74075c-93fd-4c2b-adde-28b929af76b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_654004bd-35eb-49dd-9e18-acb23f61aba8" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4e74075c-93fd-4c2b-adde-28b929af76b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCMember_e6590ebf-db56-4ccf-a74c-d2e9c5bd6b6a" xlink:href="fang-20210930.xsd#fang_GuidonOperatingLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4e74075c-93fd-4c2b-adde-28b929af76b9" xlink:to="loc_fang_GuidonOperatingLLCMember_e6590ebf-db56-4ccf-a74c-d2e9c5bd6b6a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_93a898ec-4f16-4cf4-9275-3944a80b39a4" xlink:href="fang-20210930.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4e74075c-93fd-4c2b-adde-28b929af76b9" xlink:to="loc_fang_QEPResourcesIncMember_93a898ec-4f16-4cf4-9275-3944a80b39a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_ea5d5b44-0868-41b6-9d5b-906320369bd8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_441abc5f-f11b-4713-8c56-f5b62fe1d546" xlink:to="loc_srt_StatementGeographicalAxis_ea5d5b44-0868-41b6-9d5b-906320369bd8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_ea5d5b44-0868-41b6-9d5b-906320369bd8_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_ea5d5b44-0868-41b6-9d5b-906320369bd8" xlink:to="loc_srt_SegmentGeographicalDomain_ea5d5b44-0868-41b6-9d5b-906320369bd8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_7b3bf31c-b393-45e9-82bd-3fad8735b24d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_ea5d5b44-0868-41b6-9d5b-906320369bd8" xlink:to="loc_srt_SegmentGeographicalDomain_7b3bf31c-b393-45e9-82bd-3fad8735b24d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NorthernMidlandBasinMember_417741fa-8288-4f6f-998e-f0c8a3a3bc3e" xlink:href="fang-20210930.xsd#fang_NorthernMidlandBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_7b3bf31c-b393-45e9-82bd-3fad8735b24d" xlink:to="loc_fang_NorthernMidlandBasinMember_417741fa-8288-4f6f-998e-f0c8a3a3bc3e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESScheduleofAcquisitionConsiderationPaidDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#ACQUISITIONSANDDIVESTITURESScheduleofAcquisitionConsiderationPaidDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESScheduleofAcquisitionConsiderationPaidDetails" xlink:type="extended" id="i69cf2624201a48038f03cc7911b65f77_ACQUISITIONSANDDIVESTITURESScheduleofAcquisitionConsiderationPaidDetails">
    <link:loc xlink:type="locator" xlink:label="loc_fang_ScheduleOfAssetAcquisitionLineItems_2b63e4e2-a17b-4ecd-b55e-94bbfc95fae4" xlink:href="fang-20210930.xsd#fang_ScheduleOfAssetAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_24e61249-925c-4662-84ba-78fb0f1dc925" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_2b63e4e2-a17b-4ecd-b55e-94bbfc95fae4" xlink:to="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_24e61249-925c-4662-84ba-78fb0f1dc925" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionSharePrice_e2d10a04-fdc1-43c0-b456-1b3c7d3b1c9b" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionSharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_2b63e4e2-a17b-4ecd-b55e-94bbfc95fae4" xlink:to="loc_fang_AssetAcquisitionSharePrice_e2d10a04-fdc1-43c0-b456-1b3c7d3b1c9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionFairValueCommonStockIssued_30ccc2f5-450d-4c2c-91bf-89c57727a00a" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionFairValueCommonStockIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_2b63e4e2-a17b-4ecd-b55e-94bbfc95fae4" xlink:to="loc_fang_AssetAcquisitionFairValueCommonStockIssued_30ccc2f5-450d-4c2c-91bf-89c57727a00a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_PaymentsForAssetAcquisitions_3178b587-02ed-437c-8a6b-2cb6c6b15a5b" xlink:href="fang-20210930.xsd#fang_PaymentsForAssetAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_2b63e4e2-a17b-4ecd-b55e-94bbfc95fae4" xlink:to="loc_fang_PaymentsForAssetAcquisitions_3178b587-02ed-437c-8a6b-2cb6c6b15a5b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionConsiderationTransferred_14316b1e-38e0-4f22-8ebf-d3954ae4cb32" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetAcquisitionConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_2b63e4e2-a17b-4ecd-b55e-94bbfc95fae4" xlink:to="loc_us-gaap_AssetAcquisitionConsiderationTransferred_14316b1e-38e0-4f22-8ebf-d3954ae4cb32" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ScheduleOfAssetAcquisitionTable_0d945e07-2977-49d1-bc43-947ea806cb50" xlink:href="fang-20210930.xsd#fang_ScheduleOfAssetAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_2b63e4e2-a17b-4ecd-b55e-94bbfc95fae4" xlink:to="loc_fang_ScheduleOfAssetAcquisitionTable_0d945e07-2977-49d1-bc43-947ea806cb50" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_8b1b0a36-63a2-4a06-99dc-bb274eb36a36" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_fang_ScheduleOfAssetAcquisitionTable_0d945e07-2977-49d1-bc43-947ea806cb50" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_8b1b0a36-63a2-4a06-99dc-bb274eb36a36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8b1b0a36-63a2-4a06-99dc-bb274eb36a36_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_8b1b0a36-63a2-4a06-99dc-bb274eb36a36" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8b1b0a36-63a2-4a06-99dc-bb274eb36a36_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5fc24965-2c6e-48b8-840e-267b9234f177" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_8b1b0a36-63a2-4a06-99dc-bb274eb36a36" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5fc24965-2c6e-48b8-840e-267b9234f177" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCMember_bd5b929e-ba95-4302-bf63-b0833981c613" xlink:href="fang-20210930.xsd#fang_GuidonOperatingLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5fc24965-2c6e-48b8-840e-267b9234f177" xlink:to="loc_fang_GuidonOperatingLLCMember_bd5b929e-ba95-4302-bf63-b0833981c613" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESScheduleofPurchasePriceAllocationDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#ACQUISITIONSANDDIVESTITURESScheduleofPurchasePriceAllocationDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESScheduleofPurchasePriceAllocationDetails" xlink:type="extended" id="ifa479022045b4d278635176f6af508a5_ACQUISITIONSANDDIVESTITURESScheduleofPurchasePriceAllocationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_fang_ScheduleOfAssetAcquisitionLineItems_42b598ee-da52-4f22-abb6-fa73efbc6098" xlink:href="fang-20210930.xsd#fang_ScheduleOfAssetAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionConsiderationTransferred_cce09c10-8fca-4e07-a0ff-8a31aa71e9a8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetAcquisitionConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_42b598ee-da52-4f22-abb6-fa73efbc6098" xlink:to="loc_us-gaap_AssetAcquisitionConsiderationTransferred_cce09c10-8fca-4e07-a0ff-8a31aa71e9a8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_67172203-386f-4714-b50a-8543306fd570" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_42b598ee-da52-4f22-abb6-fa73efbc6098" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_67172203-386f-4714-b50a-8543306fd570" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionAssetRetirementObligation_6f7fd0ac-5688-49b6-8b00-ea6bb88fdcca" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionAssetRetirementObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_67172203-386f-4714-b50a-8543306fd570" xlink:to="loc_fang_AssetAcquisitionAssetRetirementObligation_6f7fd0ac-5688-49b6-8b00-ea6bb88fdcca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_1db56967-dc2d-4358-aaf4-4d9c37198c03" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_42b598ee-da52-4f22-abb6-fa73efbc6098" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_1db56967-dc2d-4358-aaf4-4d9c37198c03" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionOilAndGasProperties_ef36518e-c5bb-4960-9d4c-138ff365f65d" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_1db56967-dc2d-4358-aaf4-4d9c37198c03" xlink:to="loc_fang_AssetAcquisitionOilAndGasProperties_ef36518e-c5bb-4960-9d4c-138ff365f65d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionMidstreamAssets_d75cc0d3-76e0-4575-bb86-8064eb7b8285" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionMidstreamAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_1db56967-dc2d-4358-aaf4-4d9c37198c03" xlink:to="loc_fang_AssetAcquisitionMidstreamAssets_d75cc0d3-76e0-4575-bb86-8064eb7b8285" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionAssetsAcquired_675066d1-026c-4d6e-a088-5129df049cf4" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionAssetsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_1db56967-dc2d-4358-aaf4-4d9c37198c03" xlink:to="loc_fang_AssetAcquisitionAssetsAcquired_675066d1-026c-4d6e-a088-5129df049cf4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet_8a6df859-296e-425f-b657-cd58dc1b8785" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_42b598ee-da52-4f22-abb6-fa73efbc6098" xlink:to="loc_fang_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet_8a6df859-296e-425f-b657-cd58dc1b8785" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ScheduleOfAssetAcquisitionTable_96cdd8aa-4590-47a9-bed6-af3133c5d9ac" xlink:href="fang-20210930.xsd#fang_ScheduleOfAssetAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_fang_ScheduleOfAssetAcquisitionLineItems_42b598ee-da52-4f22-abb6-fa73efbc6098" xlink:to="loc_fang_ScheduleOfAssetAcquisitionTable_96cdd8aa-4590-47a9-bed6-af3133c5d9ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_f5cffce5-35a7-4686-ade6-8b18e641ed40" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_fang_ScheduleOfAssetAcquisitionTable_96cdd8aa-4590-47a9-bed6-af3133c5d9ac" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_f5cffce5-35a7-4686-ade6-8b18e641ed40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f5cffce5-35a7-4686-ade6-8b18e641ed40_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_f5cffce5-35a7-4686-ade6-8b18e641ed40" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f5cffce5-35a7-4686-ade6-8b18e641ed40_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_464f925f-092a-455a-ba2a-f868549abf21" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_f5cffce5-35a7-4686-ade6-8b18e641ed40" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_464f925f-092a-455a-ba2a-f868549abf21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCMember_da683dd1-0e80-4508-887f-ad69c47a0bf9" xlink:href="fang-20210930.xsd#fang_GuidonOperatingLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_464f925f-092a-455a-ba2a-f868549abf21" xlink:to="loc_fang_GuidonOperatingLLCMember_da683dd1-0e80-4508-887f-ad69c47a0bf9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESScheduleOfAcquisitionConsiderationPaidDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#ACQUISITIONSANDDIVESTITURESScheduleOfAcquisitionConsiderationPaidDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESScheduleOfAcquisitionConsiderationPaidDetails" xlink:type="extended" id="i3c7833e6c0e84ffb844e97a010de1fe4_ACQUISITIONSANDDIVESTITURESScheduleOfAcquisitionConsiderationPaidDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_061a61fd-199e-4196-b427-d1e041066d8d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesSharesEligibleToBeConverted_1e34bdc7-9fae-4017-bfef-cc9efb4ffb17" xlink:href="fang-20210930.xsd#fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesSharesEligibleToBeConverted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_061a61fd-199e-4196-b427-d1e041066d8d" xlink:to="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesSharesEligibleToBeConverted_1e34bdc7-9fae-4017-bfef-cc9efb4ffb17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesPrecombinationConsideration_b8eac606-a607-4510-8d97-b5152615a308" xlink:href="fang-20210930.xsd#fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesPrecombinationConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_061a61fd-199e-4196-b427-d1e041066d8d" xlink:to="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesPrecombinationConsideration_b8eac606-a607-4510-8d97-b5152615a308" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_051aebab-58dc-4280-a0de-2df776f6c54c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_061a61fd-199e-4196-b427-d1e041066d8d" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_051aebab-58dc-4280-a0de-2df776f6c54c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare_061511fc-dcde-4f10-894f-c273bd94d673" xlink:href="fang-20210930.xsd#fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_061a61fd-199e-4196-b427-d1e041066d8d" xlink:to="loc_fang_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare_061511fc-dcde-4f10-894f-c273bd94d673" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesAdditionalShares_85c8cd93-7a38-4437-b57d-111c41abb31d" xlink:href="fang-20210930.xsd#fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesAdditionalShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_061a61fd-199e-4196-b427-d1e041066d8d" xlink:to="loc_fang_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesAdditionalShares_85c8cd93-7a38-4437-b57d-111c41abb31d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionSharePrice_07a39f80-a5e5-4bfc-bd85-c12944a1a62c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionSharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_061a61fd-199e-4196-b427-d1e041066d8d" xlink:to="loc_us-gaap_BusinessAcquisitionSharePrice_07a39f80-a5e5-4bfc-bd85-c12944a1a62c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_222e28d9-e583-409d-b139-10b7b21af60b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_061a61fd-199e-4196-b427-d1e041066d8d" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_222e28d9-e583-409d-b139-10b7b21af60b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_5fb83ac6-4382-40f9-8458-c97ae13195f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_061a61fd-199e-4196-b427-d1e041066d8d" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_5fb83ac6-4382-40f9-8458-c97ae13195f4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_17a3e971-fb0e-4068-a745-483d21322878" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_5fb83ac6-4382-40f9-8458-c97ae13195f4" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_17a3e971-fb0e-4068-a745-483d21322878" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_17a3e971-fb0e-4068-a745-483d21322878_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_17a3e971-fb0e-4068-a745-483d21322878" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_17a3e971-fb0e-4068-a745-483d21322878_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_eabec598-d28a-4e43-a46f-625add093f5f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_17a3e971-fb0e-4068-a745-483d21322878" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_eabec598-d28a-4e43-a46f-625add093f5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_27b9f3a8-2ba6-49aa-b6e4-1b9af6e68b80" xlink:href="fang-20210930.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_eabec598-d28a-4e43-a46f-625add093f5f" xlink:to="loc_fang_QEPResourcesIncMember_27b9f3a8-2ba6-49aa-b6e4-1b9af6e68b80" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESScheduleofPreliminaryPurchasePriceAllocationDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#ACQUISITIONSANDDIVESTITURESScheduleofPreliminaryPurchasePriceAllocationDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESScheduleofPreliminaryPurchasePriceAllocationDetails" xlink:type="extended" id="i6751bcbe73674b9292d559eb9c83f1c3_ACQUISITIONSANDDIVESTITURESScheduleofPreliminaryPurchasePriceAllocationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_8f043aa7-50fc-4dfc-a984-de7fb20194d3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_8a18a050-d071-4357-9331-4f4dc1093560" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8f043aa7-50fc-4dfc-a984-de7fb20194d3" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_8a18a050-d071-4357-9331-4f4dc1093560" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_557140d1-f693-4e32-9749-6c815c5be80e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferredAbstract_8a18a050-d071-4357-9331-4f4dc1093560" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_557140d1-f693-4e32-9749-6c815c5be80e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8f043aa7-50fc-4dfc-a984-de7fb20194d3" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_4520d397-2cbe-4081-83d6-76e21d2d2078" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_4520d397-2cbe-4081-83d6-76e21d2d2078" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedCapitalExpenditures_4a482927-19e7-4c65-a2e5-f765fc5c04c5" xlink:href="fang-20210930.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedCapitalExpenditures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedCapitalExpenditures_4a482927-19e7-4c65-a2e5-f765fc5c04c5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOtherAccruedLiabilities_e0aa881f-92d7-42b5-8a13-314d5ada4add" xlink:href="fang-20210930.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOtherAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOtherAccruedLiabilities_e0aa881f-92d7-42b5-8a13-314d5ada4add" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesContractWithCustomer_0610e84e-74ea-4335-ae4b-f4c3f3ff499d" xlink:href="fang-20210930.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesContractWithCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesContractWithCustomer_0610e84e-74ea-4335-ae4b-f4c3f3ff499d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedNoncurrentDerivativeInstrumentLiabilities_64d83cec-c65a-414c-8751-332e5c5260dc" xlink:href="fang-20210930.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedNoncurrentDerivativeInstrumentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedNoncurrentDerivativeInstrumentLiabilities_64d83cec-c65a-414c-8751-332e5c5260dc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt_896cc546-87f3-4640-9931-070a801818f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt_896cc546-87f3-4640-9931-070a801818f9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetRetirementObligation_5ce4aefb-d9b0-427a-a7a7-bd37c77d0558" xlink:href="fang-20210930.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetRetirementObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetRetirementObligation_5ce4aefb-d9b0-427a-a7a7-bd37c77d0558" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_93692c91-32e6-4e4e-be44-bdb2cb3d8c90" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_93692c91-32e6-4e4e-be44-bdb2cb3d8c90" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_e8cb1e2b-2705-4c54-a114-aa3c67976d0b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_13de283a-981d-46f2-942f-9fb82abef3b5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_e8cb1e2b-2705-4c54-a114-aa3c67976d0b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8f043aa7-50fc-4dfc-a984-de7fb20194d3" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_b53628b6-3a17-49f1-bf19-0428ae6291f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_b53628b6-3a17-49f1-bf19-0428ae6291f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOilAndGasJointInterestBillingReceivablesCurrent_b9ae8a6d-786c-402e-acc2-5675b8588d5d" xlink:href="fang-20210930.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOilAndGasJointInterestBillingReceivablesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOilAndGasJointInterestBillingReceivablesCurrent_b9ae8a6d-786c-402e-acc2-5675b8588d5d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_a5dd3a0a-a166-4fc2-bd53-acce372ffe6c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_a5dd3a0a-a166-4fc2-bd53-acce372ffe6c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_e4ee9cdb-6666-4324-b343-56e627033a0b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_e4ee9cdb-6666-4324-b343-56e627033a0b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsIncomeTaxesReceivableCurrent_396ee330-fd2b-4195-be27-2abd2c038181" xlink:href="fang-20210930.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsIncomeTaxesReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsIncomeTaxesReceivableCurrent_396ee330-fd2b-4195-be27-2abd2c038181" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_1218f0d8-7b1e-470e-99b0-d385383a8290" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_1218f0d8-7b1e-470e-99b0-d385383a8290" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOilAndGasProperties_43a031b3-990a-4f99-abbc-703e36d00643" xlink:href="fang-20210930.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOilAndGasProperties_43a031b3-990a-4f99-abbc-703e36d00643" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherPropertyPlantAndEquipment_eee47c54-1e65-48cc-80f4-7f98de9a1284" xlink:href="fang-20210930.xsd#fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_fang_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherPropertyPlantAndEquipment_eee47c54-1e65-48cc-80f4-7f98de9a1284" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_2b703515-d730-49f3-b8be-68a84be0a44c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_2b703515-d730-49f3-b8be-68a84be0a44c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_777a194d-9c3a-4914-acb6-2b298a2d1188" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_777a194d-9c3a-4914-acb6-2b298a2d1188" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b6942b2a-87f9-416c-8e9f-df1b816fa92c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_6665f8c2-920f-4364-ad22-cdf408348af1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_b6942b2a-87f9-416c-8e9f-df1b816fa92c" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_e841ece8-0a40-4de7-b63b-69171939b609" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8f043aa7-50fc-4dfc-a984-de7fb20194d3" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_e841ece8-0a40-4de7-b63b-69171939b609" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3ff452d8-c122-47dd-aebd-7ef3fb608942" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8f043aa7-50fc-4dfc-a984-de7fb20194d3" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3ff452d8-c122-47dd-aebd-7ef3fb608942" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_df1d9459-c6e4-4bcc-97d9-eb5efa8ab6c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3ff452d8-c122-47dd-aebd-7ef3fb608942" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_df1d9459-c6e4-4bcc-97d9-eb5efa8ab6c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_df1d9459-c6e4-4bcc-97d9-eb5efa8ab6c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_df1d9459-c6e4-4bcc-97d9-eb5efa8ab6c3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_df1d9459-c6e4-4bcc-97d9-eb5efa8ab6c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a23f29fd-02c3-4932-af12-bafec2a48097" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_df1d9459-c6e4-4bcc-97d9-eb5efa8ab6c3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a23f29fd-02c3-4932-af12-bafec2a48097" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_2e55bf01-cbc6-40ec-877c-593358e58384" xlink:href="fang-20210930.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a23f29fd-02c3-4932-af12-bafec2a48097" xlink:to="loc_fang_QEPResourcesIncMember_2e55bf01-cbc6-40ec-877c-593358e58384" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESBusinessAcquisitionProFormaInformationDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#ACQUISITIONSANDDIVESTITURESBusinessAcquisitionProFormaInformationDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESBusinessAcquisitionProFormaInformationDetails" xlink:type="extended" id="i2812f34ad00f408180725b6026d64c9e_ACQUISITIONSANDDIVESTITURESBusinessAcquisitionProFormaInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_e8e2066a-63ad-4151-88a7-c258bf0b2912" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_2a7cb2ff-1c60-4f9e-ac42-7bf980529171" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e8e2066a-63ad-4151-88a7-c258bf0b2912" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_2a7cb2ff-1c60-4f9e-ac42-7bf980529171" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax_fd737020-aaaa-4799-acbf-5893e6be5e3e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e8e2066a-63ad-4151-88a7-c258bf0b2912" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax_fd737020-aaaa-4799-acbf-5893e6be5e3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_5e7c7883-316b-4a36-a282-a31d6313e902" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e8e2066a-63ad-4151-88a7-c258bf0b2912" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_5e7c7883-316b-4a36-a282-a31d6313e902" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_bcdc1388-0e60-4473-9a4e-7070aa57a6b5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e8e2066a-63ad-4151-88a7-c258bf0b2912" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_bcdc1388-0e60-4473-9a4e-7070aa57a6b5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_d5351c6f-b591-4942-8bea-beb172e2d1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e8e2066a-63ad-4151-88a7-c258bf0b2912" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_d5351c6f-b591-4942-8bea-beb172e2d1b4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c7c75097-ce80-4d67-8e6d-4798d9295a45" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e8e2066a-63ad-4151-88a7-c258bf0b2912" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c7c75097-ce80-4d67-8e6d-4798d9295a45" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_2af8f65d-94c5-43f2-8b27-c8ba05fda435" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c7c75097-ce80-4d67-8e6d-4798d9295a45" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_2af8f65d-94c5-43f2-8b27-c8ba05fda435" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2af8f65d-94c5-43f2-8b27-c8ba05fda435_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_2af8f65d-94c5-43f2-8b27-c8ba05fda435" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2af8f65d-94c5-43f2-8b27-c8ba05fda435_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_75bf59d3-c65f-441f-a884-f898794acf9a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_2af8f65d-94c5-43f2-8b27-c8ba05fda435" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_75bf59d3-c65f-441f-a884-f898794acf9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_cf7e5e37-9e13-49be-9a82-1f6bdd2b12b1" xlink:href="fang-20210930.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_75bf59d3-c65f-441f-a884-f898794acf9a" xlink:to="loc_fang_QEPResourcesIncMember_cf7e5e37-9e13-49be-9a82-1f6bdd2b12b1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESDivestituresDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#ACQUISITIONSANDDIVESTITURESDivestituresDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/ACQUISITIONSANDDIVESTITURESDivestituresDetails" xlink:type="extended" id="i6ee336cbf64b4c3890a0d74e63e5bcd3_ACQUISITIONSANDDIVESTITURESDivestituresDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_e93651d1-32f4-4f9f-8729-c196cc9d5df7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AreaOfLand_3b5f28d0-ea60-4071-a316-4137ac8a39db" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AreaOfLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e93651d1-32f4-4f9f-8729-c196cc9d5df7" xlink:to="loc_us-gaap_AreaOfLand_3b5f28d0-ea60-4071-a316-4137ac8a39db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CombinedTierOneAcres_76903862-b46a-4bec-b192-287cb9bef2ee" xlink:href="fang-20210930.xsd#fang_CombinedTierOneAcres"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e93651d1-32f4-4f9f-8729-c196cc9d5df7" xlink:to="loc_fang_CombinedTierOneAcres_76903862-b46a-4bec-b192-287cb9bef2ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_4eddf30c-553f-41af-9714-84ab8d4dec31" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e93651d1-32f4-4f9f-8729-c196cc9d5df7" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_4eddf30c-553f-41af-9714-84ab8d4dec31" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_OilAndGasProductionReserveVolume_982cb3af-7199-4b26-987e-8492fc536bc3" xlink:href="fang-20210930.xsd#fang_OilAndGasProductionReserveVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e93651d1-32f4-4f9f-8729-c196cc9d5df7" xlink:to="loc_fang_OilAndGasProductionReserveVolume_982cb3af-7199-4b26-987e-8492fc536bc3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductionBarrelsOfOilEquivalents1_092e7655-a8dc-496d-aed5-47cfb799868b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductionBarrelsOfOilEquivalents1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e93651d1-32f4-4f9f-8729-c196cc9d5df7" xlink:to="loc_srt_ProductionBarrelsOfOilEquivalents1_092e7655-a8dc-496d-aed5-47cfb799868b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductiveOilWellsNumberOfWellsNet_06f51beb-a660-4a06-be8a-7525c6085de0" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductiveOilWellsNumberOfWellsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e93651d1-32f4-4f9f-8729-c196cc9d5df7" xlink:to="loc_srt_ProductiveOilWellsNumberOfWellsNet_06f51beb-a660-4a06-be8a-7525c6085de0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4bf6ad96-bd6b-49ad-b780-7d7c5eddf95b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_e93651d1-32f4-4f9f-8729-c196cc9d5df7" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4bf6ad96-bd6b-49ad-b780-7d7c5eddf95b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_06a75bc7-9751-408e-9c11-108806b2ba81" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4bf6ad96-bd6b-49ad-b780-7d7c5eddf95b" xlink:to="loc_srt_StatementGeographicalAxis_06a75bc7-9751-408e-9c11-108806b2ba81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_06a75bc7-9751-408e-9c11-108806b2ba81_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_06a75bc7-9751-408e-9c11-108806b2ba81" xlink:to="loc_srt_SegmentGeographicalDomain_06a75bc7-9751-408e-9c11-108806b2ba81_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_d5285a5a-de38-41fb-b241-69cfcb3096a6" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_06a75bc7-9751-408e-9c11-108806b2ba81" xlink:to="loc_srt_SegmentGeographicalDomain_d5285a5a-de38-41fb-b241-69cfcb3096a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SouthernMidlandBasinMember_401887f6-5787-48ee-9809-144111eb37b3" xlink:href="fang-20210930.xsd#fang_SouthernMidlandBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_d5285a5a-de38-41fb-b241-69cfcb3096a6" xlink:to="loc_fang_SouthernMidlandBasinMember_401887f6-5787-48ee-9809-144111eb37b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DelawareBasinMember_d33f5c1e-f537-44fb-9fa1-887a10d5d742" xlink:href="fang-20210930.xsd#fang_DelawareBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_d5285a5a-de38-41fb-b241-69cfcb3096a6" xlink:to="loc_fang_DelawareBasinMember_d33f5c1e-f537-44fb-9fa1-887a10d5d742" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_72986cae-43b2-4095-863f-1c800fcee6e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4bf6ad96-bd6b-49ad-b780-7d7c5eddf95b" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_72986cae-43b2-4095-863f-1c800fcee6e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_72986cae-43b2-4095-863f-1c800fcee6e4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_72986cae-43b2-4095-863f-1c800fcee6e4" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_72986cae-43b2-4095-863f-1c800fcee6e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_23ef85df-ca5c-46e6-95d2-7a9f7330d73d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_72986cae-43b2-4095-863f-1c800fcee6e4" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_23ef85df-ca5c-46e6-95d2-7a9f7330d73d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_1fe2108e-2b75-4323-9f42-8d888d0c7fda" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_23ef85df-ca5c-46e6-95d2-7a9f7330d73d" xlink:to="loc_us-gaap_SubsequentEventMember_1fe2108e-2b75-4323-9f42-8d888d0c7fda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4e19325a-913d-4104-b4a5-7ac50bd9d091" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4bf6ad96-bd6b-49ad-b780-7d7c5eddf95b" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4e19325a-913d-4104-b4a5-7ac50bd9d091" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_4e19325a-913d-4104-b4a5-7ac50bd9d091_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4e19325a-913d-4104-b4a5-7ac50bd9d091" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_4e19325a-913d-4104-b4a5-7ac50bd9d091_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_d0ee74b5-846d-4d4b-91d2-324e91774f52" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_4e19325a-913d-4104-b4a5-7ac50bd9d091" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_d0ee74b5-846d-4d4b-91d2-324e91774f52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_PermianMember_27c3f973-38e0-4477-a32a-fa72658366df" xlink:href="fang-20210930.xsd#fang_PermianMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_d0ee74b5-846d-4d4b-91d2-324e91774f52" xlink:to="loc_fang_PermianMember_27c3f973-38e0-4477-a32a-fa72658366df" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENTDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#PROPERTYANDEQUIPMENTDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENTDetails" xlink:type="extended" id="ide52bb2574a448da85a44b7a19a1bd92_PROPERTYANDEQUIPMENTDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_b8cfd546-6431-4c00-bca4-8b9b336d4f8d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OilAndGasPropertyAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_b8cfd546-6431-4c00-bca4-8b9b336d4f8d" xlink:to="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedCostsProvedProperties_1aa15d9e-f6fc-4d4c-adae-1c2d76783c2f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalizedCostsProvedProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:to="loc_us-gaap_CapitalizedCostsProvedProperties_1aa15d9e-f6fc-4d4c-adae-1c2d76783c2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative_f86dbf24-79e9-426d-8e9f-3e3533531b89" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:to="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative_f86dbf24-79e9-426d-8e9f-3e3533531b89" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OilAndGasPropertyFullCostMethodGross_51a2a95f-1f5d-4b63-add7-dd2b828338ec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OilAndGasPropertyFullCostMethodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:to="loc_us-gaap_OilAndGasPropertyFullCostMethodGross_51a2a95f-1f5d-4b63-add7-dd2b828338ec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_cb039433-a9db-40d8-a0a3-01399d1782d5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_cb039433-a9db-40d8-a0a3-01399d1782d5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CapitalizedCostsAccumulatedImpairment_a4a842fc-b4ab-4618-be1a-982961c81fd4" xlink:href="fang-20210930.xsd#fang_CapitalizedCostsAccumulatedImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:to="loc_fang_CapitalizedCostsAccumulatedImpairment_a4a842fc-b4ab-4618-be1a-982961c81fd4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet_54f12e06-86d9-4bee-b560-a84c53a9dd45" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:to="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet_54f12e06-86d9-4bee-b560-a84c53a9dd45" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_PipelineandGasGatheringAssets_1f8d503e-471c-41ef-9e05-ebd5b288a263" xlink:href="fang-20210930.xsd#fang_PipelineandGasGatheringAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:to="loc_fang_PipelineandGasGatheringAssets_1f8d503e-471c-41ef-9e05-ebd5b288a263" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentOther_c55f755d-0d17-41a8-bb6a-91c2a98758ae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentOther_c55f755d-0d17-41a8-bb6a-91c2a98758ae" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_5ecf8542-1813-4591-8506-fb679a6922ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OilAndGasPropertyAbstract_f54860f4-975f-47b9-8167-c76106e611d9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_5ecf8542-1813-4591-8506-fb679a6922ac" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6bbecab1-422d-46be-9ad8-81b868999829" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_b8cfd546-6431-4c00-bca4-8b9b336d4f8d" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6bbecab1-422d-46be-9ad8-81b868999829" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_f5ee8f94-82e7-4ac2-9565-09b2e9fc65b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6bbecab1-422d-46be-9ad8-81b868999829" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_f5ee8f94-82e7-4ac2-9565-09b2e9fc65b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f5ee8f94-82e7-4ac2-9565-09b2e9fc65b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_f5ee8f94-82e7-4ac2-9565-09b2e9fc65b8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_f5ee8f94-82e7-4ac2-9565-09b2e9fc65b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e682f7f3-8d0b-4e5c-9ae1-212069c8452b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_f5ee8f94-82e7-4ac2-9565-09b2e9fc65b8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e682f7f3-8d0b-4e5c-9ae1-212069c8452b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OilAndGasPropertiesMember_fe34d145-31c2-4ca5-addb-b4b6d71b99ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OilAndGasPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e682f7f3-8d0b-4e5c-9ae1-212069c8452b" xlink:to="loc_us-gaap_OilAndGasPropertiesMember_fe34d145-31c2-4ca5-addb-b4b6d71b99ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_68808231-6ec5-4707-9ff1-7476487cc4a9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentOtherTypesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e682f7f3-8d0b-4e5c-9ae1-212069c8452b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_68808231-6ec5-4707-9ff1-7476487cc4a9" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENTNarrativeDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#PROPERTYANDEQUIPMENTNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/PROPERTYANDEQUIPMENTNarrativeDetails" xlink:type="extended" id="i1275b8f66f794ad0a762f27a67dd4453_PROPERTYANDEQUIPMENTNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_eb6e87f9-1a11-4695-a27f-87055103d243" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfOilAndGasProperties_843ca8da-2d42-42c6-980f-9ea27787b217" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb6e87f9-1a11-4695-a27f-87055103d243" xlink:to="loc_us-gaap_ImpairmentOfOilAndGasProperties_843ca8da-2d42-42c6-980f-9ea27787b217" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OilAndGasProducingPropertiesOfRateRegulatedCompaniesUnamortizedCost_b93f505b-31a4-467a-9b7e-b84a6b1a8ab3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OilAndGasProducingPropertiesOfRateRegulatedCompaniesUnamortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb6e87f9-1a11-4695-a27f-87055103d243" xlink:to="loc_us-gaap_OilAndGasProducingPropertiesOfRateRegulatedCompaniesUnamortizedCost_b93f505b-31a4-467a-9b7e-b84a6b1a8ab3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_bc5dce98-625d-4107-8b7e-cc7fd7214db8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb6e87f9-1a11-4695-a27f-87055103d243" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_bc5dce98-625d-4107-8b7e-cc7fd7214db8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_b7e02dc6-ccbb-4e3d-b327-b4c2bdfe5acd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_bc5dce98-625d-4107-8b7e-cc7fd7214db8" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_b7e02dc6-ccbb-4e3d-b327-b4c2bdfe5acd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b7e02dc6-ccbb-4e3d-b327-b4c2bdfe5acd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b7e02dc6-ccbb-4e3d-b327-b4c2bdfe5acd" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b7e02dc6-ccbb-4e3d-b327-b4c2bdfe5acd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c659aebb-07b4-4d0a-adb5-e617ee6a4083" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b7e02dc6-ccbb-4e3d-b327-b4c2bdfe5acd" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c659aebb-07b4-4d0a-adb5-e617ee6a4083" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCAndQEPResourcesMember_79d43b5b-1858-4100-be99-f5bf314a3479" xlink:href="fang-20210930.xsd#fang_GuidonOperatingLLCAndQEPResourcesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c659aebb-07b4-4d0a-adb5-e617ee6a4083" xlink:to="loc_fang_GuidonOperatingLLCAndQEPResourcesMember_79d43b5b-1858-4100-be99-f5bf314a3479" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_010cbab9-ce00-4f7b-807b-0e7a01b116df" xlink:href="fang-20210930.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c659aebb-07b4-4d0a-adb5-e617ee6a4083" xlink:to="loc_fang_QEPResourcesIncMember_010cbab9-ce00-4f7b-807b-0e7a01b116df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCMember_4cf40a62-44eb-4862-bce5-84b62a49c23c" xlink:href="fang-20210930.xsd#fang_GuidonOperatingLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c659aebb-07b4-4d0a-adb5-e617ee6a4083" xlink:to="loc_fang_GuidonOperatingLLCMember_4cf40a62-44eb-4862-bce5-84b62a49c23c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTLongtermDebtDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DEBTLongtermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTLongtermDebtDetails" xlink:type="extended" id="i9d0914f53f424286a98b8b4b77416926_DEBTLongtermDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_20ae1b0b-68b0-4137-8729-f6c01d96ab55" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_20ae1b0b-68b0-4137-8729-f6c01d96ab55" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_a632382e-ea56-478b-83b0-a0dcd43a694d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_a632382e-ea56-478b-83b0-a0dcd43a694d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_5c577620-ad66-42d4-bbf3-7ff3a43c0408" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_5c577620-ad66-42d4-bbf3-7ff3a43c0408" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_06328c7c-45e3-4062-b3c5-4f3c7865f922" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_06328c7c-45e3-4062-b3c5-4f3c7865f922" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedPremium_1d78fa2e-3b14-4b00-9f89-aa465bb17934" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentUnamortizedPremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedPremium_1d78fa2e-3b14-4b00-9f89-aa465bb17934" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateFairValueHedgeDerivativeAtFairValueNet_adead1c5-8111-4bc3-9ccc-c839734bf933" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestRateFairValueHedgeDerivativeAtFairValueNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_InterestRateFairValueHedgeDerivativeAtFairValueNet_adead1c5-8111-4bc3-9ccc-c839734bf933" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_56eb6ccd-2615-433c-b9f3-89b285f9ef98" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_LongTermDebtCurrent_56eb6ccd-2615-433c-b9f3-89b285f9ef98" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_e621be71-865e-4ec6-b608-b476bb85aa8c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_LongTermDebt_e621be71-865e-4ec6-b608-b476bb85aa8c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_d9597c22-e7c9-4fb7-8d89-18499c90bb49" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeNumberOfInstrumentsHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_d9597c22-e7c9-4fb7-8d89-18499c90bb49" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueHedgesAtFairValueNet_ad8d4074-5cef-4ae1-9a33-4192e0f5271b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueHedgesAtFairValueNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_FairValueHedgesAtFairValueNet_ad8d4074-5cef-4ae1-9a33-4192e0f5271b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFixedInterestRate_601ba77b-48c4-4f19-9092-a73e9e782423" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeFixedInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_DerivativeFixedInterestRate_601ba77b-48c4-4f19-9092-a73e9e782423" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_91393a16-52f2-4b7a-8921-1f15ca1d263c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f02ed064-dbf0-4049-8ab0-a20cc7639749" xlink:to="loc_us-gaap_DebtInstrumentTable_91393a16-52f2-4b7a-8921-1f15ca1d263c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_f3c05ce1-ed47-4465-890a-3c0e7e88309f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_91393a16-52f2-4b7a-8921-1f15ca1d263c" xlink:to="loc_us-gaap_DebtInstrumentAxis_f3c05ce1-ed47-4465-890a-3c0e7e88309f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_f3c05ce1-ed47-4465-890a-3c0e7e88309f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_f3c05ce1-ed47-4465-890a-3c0e7e88309f" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_f3c05ce1-ed47-4465-890a-3c0e7e88309f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_f3c05ce1-ed47-4465-890a-3c0e7e88309f" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4.625Notesdue2021Member_76425334-6f1b-47ab-8f8b-7f160310e694" xlink:href="fang-20210930.xsd#fang_A4.625Notesdue2021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A4.625Notesdue2021Member_76425334-6f1b-47ab-8f8b-7f160310e694" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5375SeniorNotesDue2022Member_99a5c896-5282-4383-b2cb-bec8c1b233b0" xlink:href="fang-20210930.xsd#fang_A5375SeniorNotesDue2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A5375SeniorNotesDue2022Member_99a5c896-5282-4383-b2cb-bec8c1b233b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A7.32MediumTermSeriesAdue2022Member_0b9a363f-0bf7-4f93-95a9-03c4398d9e8d" xlink:href="fang-20210930.xsd#fang_A7.32MediumTermSeriesAdue2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A7.32MediumTermSeriesAdue2022Member_0b9a363f-0bf7-4f93-95a9-03c4398d9e8d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A0900SeniorNotesDue2023Member_8d99a631-ac3d-48fe-84a2-9554455c5af1" xlink:href="fang-20210930.xsd#fang_A0900SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A0900SeniorNotesDue2023Member_8d99a631-ac3d-48fe-84a2-9554455c5af1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5250SeniorNotesDue2023Member_d9a34d70-625b-497a-976f-d7af28336294" xlink:href="fang-20210930.xsd#fang_A5250SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A5250SeniorNotesDue2023Member_d9a34d70-625b-497a-976f-d7af28336294" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A2.875SeniorNotesdue2024Member_5ad5dc54-9033-413c-9fff-f815c03290f5" xlink:href="fang-20210930.xsd#fang_A2.875SeniorNotesdue2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A2.875SeniorNotesdue2024Member_5ad5dc54-9033-413c-9fff-f815c03290f5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4750SeniorNotesDue2025Member_f489842c-76ab-4518-a511-3a74ff318c3d" xlink:href="fang-20210930.xsd#fang_A4750SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A4750SeniorNotesDue2025Member_f489842c-76ab-4518-a511-3a74ff318c3d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5.375SeniorNotesDue2025Member_c37c0ec8-3035-4c02-b620-a95b41083adc" xlink:href="fang-20210930.xsd#fang_A5.375SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A5.375SeniorNotesDue2025Member_c37c0ec8-3035-4c02-b620-a95b41083adc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3.250SeniorNotesDue2026Member_caba6b90-02be-4d49-a5c6-1ccd55fc3b08" xlink:href="fang-20210930.xsd#fang_A3.250SeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A3.250SeniorNotesDue2026Member_caba6b90-02be-4d49-a5c6-1ccd55fc3b08" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5625SeniorNotesDue2026Member_3380d143-2515-4b95-89c4-6c1427fc2c60" xlink:href="fang-20210930.xsd#fang_A5625SeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A5625SeniorNotesDue2026Member_3380d143-2515-4b95-89c4-6c1427fc2c60" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A7.125MediumTermNotesSeriesBMember_4326dcec-c46d-4d8b-a80c-753eb392e444" xlink:href="fang-20210930.xsd#fang_A7.125MediumTermNotesSeriesBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A7.125MediumTermNotesSeriesBMember_4326dcec-c46d-4d8b-a80c-753eb392e444" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3.500SeniorNotesDue2029Member_e45ab473-dd09-4422-8eb6-aa8accadacea" xlink:href="fang-20210930.xsd#fang_A3.500SeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A3.500SeniorNotesDue2029Member_e45ab473-dd09-4422-8eb6-aa8accadacea" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3125SeniorNotesDue2031Member_00337119-89dd-46d0-bae3-19fb9d94d7f0" xlink:href="fang-20210930.xsd#fang_A3125SeniorNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A3125SeniorNotesDue2031Member_00337119-89dd-46d0-bae3-19fb9d94d7f0" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4400SeniorNotesDue2051Member_86966eef-5c20-48de-ab77-7a79b9f34879" xlink:href="fang-20210930.xsd#fang_A4400SeniorNotesDue2051Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A4400SeniorNotesDue2051Member_86966eef-5c20-48de-ab77-7a79b9f34879" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DrillCoAgreementMember_2e36cd7c-da71-4a08-946e-4e4fd63e4f7e" xlink:href="fang-20210930.xsd#fang_DrillCoAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_DrillCoAgreementMember_2e36cd7c-da71-4a08-946e-4e4fd63e4f7e" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CompanyCreditFacilityMember_e29133b5-74ac-411e-a4ee-774b4e199f66" xlink:href="fang-20210930.xsd#fang_CompanyCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_CompanyCreditFacilityMember_e29133b5-74ac-411e-a4ee-774b4e199f66" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperCreditFacilityMember_54001798-dad1-40be-be09-817b974023af" xlink:href="fang-20210930.xsd#fang_ViperCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_ViperCreditFacilityMember_54001798-dad1-40be-be09-817b974023af" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5.375SeniorNotesDue2027Member_08da8508-6d60-48e4-b81b-71c793c1653f" xlink:href="fang-20210930.xsd#fang_A5.375SeniorNotesDue2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A5.375SeniorNotesDue2027Member_08da8508-6d60-48e4-b81b-71c793c1653f" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerCreditFacilityMember_b827f2fa-a3ec-4dbb-b50d-36f68252d1b6" xlink:href="fang-20210930.xsd#fang_RattlerCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_RattlerCreditFacilityMember_b827f2fa-a3ec-4dbb-b50d-36f68252d1b6" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5625SeniorNotesDue2025Member_00a12e86-8443-46e0-903b-c61302e8ffdc" xlink:href="fang-20210930.xsd#fang_A5625SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_A5625SeniorNotesDue2025Member_00a12e86-8443-46e0-903b-c61302e8ffdc" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SeniorNotesDue2029Member_0cfff886-9ec2-4b00-89f2-5a25ecdfa161" xlink:href="fang-20210930.xsd#fang_SeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e11e72c-d610-4160-a0e9-577af15397d7" xlink:to="loc_fang_SeniorNotesDue2029Member_0cfff886-9ec2-4b00-89f2-5a25ecdfa161" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_f1569f1f-0d07-493d-a0fd-1df5beb00160" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_91393a16-52f2-4b7a-8921-1f15ca1d263c" xlink:to="loc_dei_LegalEntityAxis_f1569f1f-0d07-493d-a0fd-1df5beb00160" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_f1569f1f-0d07-493d-a0fd-1df5beb00160_default" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_f1569f1f-0d07-493d-a0fd-1df5beb00160" xlink:to="loc_dei_EntityDomain_f1569f1f-0d07-493d-a0fd-1df5beb00160_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_7e0bfb6e-296b-4b00-8845-d6ed23c2a105" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_f1569f1f-0d07-493d-a0fd-1df5beb00160" xlink:to="loc_dei_EntityDomain_7e0bfb6e-296b-4b00-8845-d6ed23c2a105" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperEnergyPartnersLPMember_cd45817f-4932-44ce-a3ea-e6fd80677f35" xlink:href="fang-20210930.xsd#fang_ViperEnergyPartnersLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_7e0bfb6e-296b-4b00-8845-d6ed23c2a105" xlink:to="loc_fang_ViperEnergyPartnersLPMember_cd45817f-4932-44ce-a3ea-e6fd80677f35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerLLCMember_42774d96-8de9-4f35-8ba8-3b27ddfc78f8" xlink:href="fang-20210930.xsd#fang_RattlerLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_7e0bfb6e-296b-4b00-8845-d6ed23c2a105" xlink:to="loc_fang_RattlerLLCMember_42774d96-8de9-4f35-8ba8-3b27ddfc78f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_ccb409d8-cea1-4a0c-a225-306e81898bde" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_91393a16-52f2-4b7a-8921-1f15ca1d263c" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_ccb409d8-cea1-4a0c-a225-306e81898bde" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_ccb409d8-cea1-4a0c-a225-306e81898bde_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_ccb409d8-cea1-4a0c-a225-306e81898bde" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_ccb409d8-cea1-4a0c-a225-306e81898bde_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_34f427bc-6093-43fd-a6af-a854c66e3c30" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_ccb409d8-cea1-4a0c-a225-306e81898bde" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_34f427bc-6093-43fd-a6af-a854c66e3c30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_258acd77-1e3d-4ca2-93be-a83e07e9925c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_34f427bc-6093-43fd-a6af-a854c66e3c30" xlink:to="loc_us-gaap_InterestRateSwapMember_258acd77-1e3d-4ca2-93be-a83e07e9925c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_f3c5ace5-e039-4e3a-9ed8-3291f039ca2f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_91393a16-52f2-4b7a-8921-1f15ca1d263c" xlink:to="loc_us-gaap_HedgingDesignationAxis_f3c5ace5-e039-4e3a-9ed8-3291f039ca2f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_f3c5ace5-e039-4e3a-9ed8-3291f039ca2f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_f3c5ace5-e039-4e3a-9ed8-3291f039ca2f" xlink:to="loc_us-gaap_HedgingDesignationDomain_f3c5ace5-e039-4e3a-9ed8-3291f039ca2f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_d7d97bff-0754-4d17-ba05-23cbd5009a1f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_f3c5ace5-e039-4e3a-9ed8-3291f039ca2f" xlink:to="loc_us-gaap_HedgingDesignationDomain_d7d97bff-0754-4d17-ba05-23cbd5009a1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_c785a166-edc6-4ae1-9080-c9ab0d666b8f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_d7d97bff-0754-4d17-ba05-23cbd5009a1f" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_c785a166-edc6-4ae1-9080-c9ab0d666b8f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTSecondAmendedandRestatedCreditFacilityDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DEBTSecondAmendedandRestatedCreditFacilityDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTSecondAmendedandRestatedCreditFacilityDetails" xlink:type="extended" id="i46aaaba0f29e4e21b6a22adbc965a36b_DEBTSecondAmendedandRestatedCreditFacilityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtInstrumentNumberOfExtensions_9ac264c5-d521-4c55-a486-58dddcec6c2e" xlink:href="fang-20210930.xsd#fang_DebtInstrumentNumberOfExtensions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_fang_DebtInstrumentNumberOfExtensions_9ac264c5-d521-4c55-a486-58dddcec6c2e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_00e9ab89-fc88-4c03-a64b-48e885a140bd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_us-gaap_DebtInstrumentTerm_00e9ab89-fc88-4c03-a64b-48e885a140bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_6199228c-bcb0-4cdc-b5dc-b3d51a177c7e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_6199228c-bcb0-4cdc-b5dc-b3d51a177c7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_LineOfCreditFacilityAdditionalBorrowingCapacity_ffed445c-33e3-465b-b915-46708d6706a8" xlink:href="fang-20210930.xsd#fang_LineOfCreditFacilityAdditionalBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_fang_LineOfCreditFacilityAdditionalBorrowingCapacity_ffed445c-33e3-465b-b915-46708d6706a8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_LineOfCreditFacilityMaximumBorrowingCapacityMaximumCommitment_1bc95ff9-7268-4256-95cd-6b9b303dbab4" xlink:href="fang-20210930.xsd#fang_LineOfCreditFacilityMaximumBorrowingCapacityMaximumCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_fang_LineOfCreditFacilityMaximumBorrowingCapacityMaximumCommitment_1bc95ff9-7268-4256-95cd-6b9b303dbab4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_beb51ad4-2525-4e28-9687-1944ea4aea23" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_us-gaap_LineOfCredit_beb51ad4-2525-4e28-9687-1944ea4aea23" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_34459ae1-ab44-4a83-8c09-08293b1ed65f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_34459ae1-ab44-4a83-8c09-08293b1ed65f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_9ce901db-52d7-49c1-8e8f-b58a21524d97" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_9ce901db-52d7-49c1-8e8f-b58a21524d97" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NumberOfLettersOfCreditOutstanding_cdbe7124-919a-44a8-9d09-3a60ddf90ce1" xlink:href="fang-20210930.xsd#fang_NumberOfLettersOfCreditOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_fang_NumberOfLettersOfCreditOutstanding_cdbe7124-919a-44a8-9d09-3a60ddf90ce1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_cf949977-55c7-4649-bb11-00773de88477" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_cf949977-55c7-4649-bb11-00773de88477" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_0fb28dfb-2203-4e0c-9515-5ca9ad4c60c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtWeightedAverageInterestRateOverTime"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_0fb28dfb-2203-4e0c-9515-5ca9ad4c60c3" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_5facfe3a-abaa-4df9-aab3-2d8b4778a7a3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_e50d3af4-49d3-4e76-8731-8c062c25db8e" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_5facfe3a-abaa-4df9-aab3-2d8b4778a7a3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_6cf42399-c841-4423-9e2b-f8cbb4e5d2ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_5facfe3a-abaa-4df9-aab3-2d8b4778a7a3" xlink:to="loc_us-gaap_DebtInstrumentAxis_6cf42399-c841-4423-9e2b-f8cbb4e5d2ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_6cf42399-c841-4423-9e2b-f8cbb4e5d2ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_6cf42399-c841-4423-9e2b-f8cbb4e5d2ab" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_6cf42399-c841-4423-9e2b-f8cbb4e5d2ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a397eeaa-715f-4199-bf30-fb7019158419" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_6cf42399-c841-4423-9e2b-f8cbb4e5d2ab" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a397eeaa-715f-4199-bf30-fb7019158419" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AmendedAndRestatedCreditAgreementMember_3f033fb1-b35a-4291-8c4f-6d13264b0170" xlink:href="fang-20210930.xsd#fang_AmendedAndRestatedCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a397eeaa-715f-4199-bf30-fb7019158419" xlink:to="loc_fang_AmendedAndRestatedCreditAgreementMember_3f033fb1-b35a-4291-8c4f-6d13264b0170" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SwinglineLoansMember_aac3b018-ac3b-425a-8c50-51a865603a41" xlink:href="fang-20210930.xsd#fang_SwinglineLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a397eeaa-715f-4199-bf30-fb7019158419" xlink:to="loc_fang_SwinglineLoansMember_aac3b018-ac3b-425a-8c50-51a865603a41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CompanyCreditFacilityMember_739f85af-5fe6-436c-a7dc-b0f85ccd8de1" xlink:href="fang-20210930.xsd#fang_CompanyCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a397eeaa-715f-4199-bf30-fb7019158419" xlink:to="loc_fang_CompanyCreditFacilityMember_739f85af-5fe6-436c-a7dc-b0f85ccd8de1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_d0744e3d-dc31-43ee-af04-69e2bf990a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_5facfe3a-abaa-4df9-aab3-2d8b4778a7a3" xlink:to="loc_us-gaap_VariableRateAxis_d0744e3d-dc31-43ee-af04-69e2bf990a4b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_d0744e3d-dc31-43ee-af04-69e2bf990a4b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_d0744e3d-dc31-43ee-af04-69e2bf990a4b" xlink:to="loc_us-gaap_VariableRateDomain_d0744e3d-dc31-43ee-af04-69e2bf990a4b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_648d4a86-6c5d-4846-97cd-1f38c9164fe4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_d0744e3d-dc31-43ee-af04-69e2bf990a4b" xlink:to="loc_us-gaap_VariableRateDomain_648d4a86-6c5d-4846-97cd-1f38c9164fe4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalFundsEffectiveSwapRateMember_d54de554-03f6-4fd3-a740-62aca45c530e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FederalFundsEffectiveSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_648d4a86-6c5d-4846-97cd-1f38c9164fe4" xlink:to="loc_us-gaap_FederalFundsEffectiveSwapRateMember_d54de554-03f6-4fd3-a740-62aca45c530e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_4af43c2a-5274-4459-8c32-bff51e719e68" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_648d4a86-6c5d-4846-97cd-1f38c9164fe4" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_4af43c2a-5274-4459-8c32-bff51e719e68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_e073179c-7489-496f-b84a-f2fd0c2cef88" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_648d4a86-6c5d-4846-97cd-1f38c9164fe4" xlink:to="loc_us-gaap_BaseRateMember_e073179c-7489-496f-b84a-f2fd0c2cef88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExternalCreditRatingByGroupingAxis_dea6a767-51e4-4eb7-9c8f-b20f284a896c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ExternalCreditRatingByGroupingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_5facfe3a-abaa-4df9-aab3-2d8b4778a7a3" xlink:to="loc_us-gaap_ExternalCreditRatingByGroupingAxis_dea6a767-51e4-4eb7-9c8f-b20f284a896c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExternalCreditRatingByGroupingDomain_dea6a767-51e4-4eb7-9c8f-b20f284a896c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ExternalCreditRatingByGroupingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ExternalCreditRatingByGroupingAxis_dea6a767-51e4-4eb7-9c8f-b20f284a896c" xlink:to="loc_us-gaap_ExternalCreditRatingByGroupingDomain_dea6a767-51e4-4eb7-9c8f-b20f284a896c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExternalCreditRatingByGroupingDomain_a77bf99e-b97d-4cb1-be72-a09f3b968d28" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ExternalCreditRatingByGroupingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ExternalCreditRatingByGroupingAxis_dea6a767-51e4-4eb7-9c8f-b20f284a896c" xlink:to="loc_us-gaap_ExternalCreditRatingByGroupingDomain_a77bf99e-b97d-4cb1-be72-a09f3b968d28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExternalCreditRatingInvestmentGradeMember_e375ee7c-a13b-4ade-a139-e8ba824947fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ExternalCreditRatingInvestmentGradeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ExternalCreditRatingByGroupingDomain_a77bf99e-b97d-4cb1-be72-a09f3b968d28" xlink:to="loc_us-gaap_ExternalCreditRatingInvestmentGradeMember_e375ee7c-a13b-4ade-a139-e8ba824947fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_dc3f6faa-aba3-48a9-a7c2-286b9c8c5024" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_5facfe3a-abaa-4df9-aab3-2d8b4778a7a3" xlink:to="loc_srt_RangeAxis_dc3f6faa-aba3-48a9-a7c2-286b9c8c5024" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_dc3f6faa-aba3-48a9-a7c2-286b9c8c5024_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_dc3f6faa-aba3-48a9-a7c2-286b9c8c5024" xlink:to="loc_srt_RangeMember_dc3f6faa-aba3-48a9-a7c2-286b9c8c5024_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_fa770920-679b-4b02-bbf0-46da057df384" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_dc3f6faa-aba3-48a9-a7c2-286b9c8c5024" xlink:to="loc_srt_RangeMember_fa770920-679b-4b02-bbf0-46da057df384" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_b55c7f65-061f-427b-9daa-612d78bd4cc4" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_fa770920-679b-4b02-bbf0-46da057df384" xlink:to="loc_srt_MinimumMember_b55c7f65-061f-427b-9daa-612d78bd4cc4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_fbe1ab4f-2ccc-47ea-a9af-6ad869f96e24" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_fa770920-679b-4b02-bbf0-46da057df384" xlink:to="loc_srt_MaximumMember_fbe1ab4f-2ccc-47ea-a9af-6ad869f96e24" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTMarch2021NotesOfferingDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DEBTMarch2021NotesOfferingDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTMarch2021NotesOfferingDetails" xlink:type="extended" id="id9a2fcd6768b4b0dbc1d539b6a4aea19_DEBTMarch2021NotesOfferingDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_1e7f2c52-3eb8-44d5-8b62-bae4558e18f3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_91e121d4-c9ac-4d1a-ae21-f2fa8d4bc51b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e7f2c52-3eb8-44d5-8b62-bae4558e18f3" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_91e121d4-c9ac-4d1a-ae21-f2fa8d4bc51b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_9178f1cd-aa9a-4f13-8ac5-04c642b3d470" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e7f2c52-3eb8-44d5-8b62-bae4558e18f3" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_9178f1cd-aa9a-4f13-8ac5-04c642b3d470" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_6eeeeea7-c076-4c0c-9451-b32a9d546d71" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e7f2c52-3eb8-44d5-8b62-bae4558e18f3" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_6eeeeea7-c076-4c0c-9451-b32a9d546d71" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_2fddc7b8-e7b3-49cd-97e1-fa3aa1c233e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromDebtNetOfIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e7f2c52-3eb8-44d5-8b62-bae4558e18f3" xlink:to="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_2fddc7b8-e7b3-49cd-97e1-fa3aa1c233e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_9df8fed1-06b3-4d6e-8d31-47e29a956807" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e7f2c52-3eb8-44d5-8b62-bae4558e18f3" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_9df8fed1-06b3-4d6e-8d31-47e29a956807" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtInstrumentRedemptionPricePercentageUponChangeOfControlTriggeringEvent_ab6f3b29-9c4a-424b-b161-789bac4df7fe" xlink:href="fang-20210930.xsd#fang_DebtInstrumentRedemptionPricePercentageUponChangeOfControlTriggeringEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e7f2c52-3eb8-44d5-8b62-bae4558e18f3" xlink:to="loc_fang_DebtInstrumentRedemptionPricePercentageUponChangeOfControlTriggeringEvent_ab6f3b29-9c4a-424b-b161-789bac4df7fe" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_54610c09-a91b-47ff-b692-9d41f7fdb992" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e7f2c52-3eb8-44d5-8b62-bae4558e18f3" xlink:to="loc_us-gaap_DebtInstrumentTable_54610c09-a91b-47ff-b692-9d41f7fdb992" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_f22585aa-403d-4e88-90c7-9e16e82666b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_54610c09-a91b-47ff-b692-9d41f7fdb992" xlink:to="loc_us-gaap_DebtInstrumentAxis_f22585aa-403d-4e88-90c7-9e16e82666b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_f22585aa-403d-4e88-90c7-9e16e82666b6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_f22585aa-403d-4e88-90c7-9e16e82666b6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_f22585aa-403d-4e88-90c7-9e16e82666b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_d52437c6-ca22-46e2-9ded-7df5007cb153" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_f22585aa-403d-4e88-90c7-9e16e82666b6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_d52437c6-ca22-46e2-9ded-7df5007cb153" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_March2021NotesMember_9a084677-3c51-4c72-8007-bd33d55a422e" xlink:href="fang-20210930.xsd#fang_March2021NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d52437c6-ca22-46e2-9ded-7df5007cb153" xlink:to="loc_fang_March2021NotesMember_9a084677-3c51-4c72-8007-bd33d55a422e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A0900SeniorNotesDue2023Member_4159b906-5a66-4b56-ab50-2c10e25eda55" xlink:href="fang-20210930.xsd#fang_A0900SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_March2021NotesMember_9a084677-3c51-4c72-8007-bd33d55a422e" xlink:to="loc_fang_A0900SeniorNotesDue2023Member_4159b906-5a66-4b56-ab50-2c10e25eda55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A3125SeniorNotesDue2031Member_8512fd9f-b2f5-4724-8165-1aed6cafca6c" xlink:href="fang-20210930.xsd#fang_A3125SeniorNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_March2021NotesMember_9a084677-3c51-4c72-8007-bd33d55a422e" xlink:to="loc_fang_A3125SeniorNotesDue2031Member_8512fd9f-b2f5-4724-8165-1aed6cafca6c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4400SeniorNotesDue2051Member_0b099337-bd46-43da-93bf-fac27eefbcab" xlink:href="fang-20210930.xsd#fang_A4400SeniorNotesDue2051Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_March2021NotesMember_9a084677-3c51-4c72-8007-bd33d55a422e" xlink:to="loc_fang_A4400SeniorNotesDue2051Member_0b099337-bd46-43da-93bf-fac27eefbcab" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTRepurchasesofNotesDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DEBTRepurchasesofNotesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTRepurchasesofNotesDetails" xlink:type="extended" id="i1c32c34b3da4465291641a307cb5b94f_DEBTRepurchasesofNotesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_b6b1850f-8de2-4d16-9831-7410419f83e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_b6b1850f-8de2-4d16-9831-7410419f83e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_97b99dac-4a2a-4570-9f49-fe63ca67914d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_97b99dac-4a2a-4570-9f49-fe63ca67914d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_8e7fe337-dc67-4004-9e46-83723462fbc1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_8e7fe337-dc67-4004-9e46-83723462fbc1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfSeniorDebt_26be0461-e348-4cd0-8f04-4e4e312b0ab8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfSeniorDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_us-gaap_RepaymentsOfSeniorDebt_26be0461-e348-4cd0-8f04-4e4e312b0ab8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtInstrumentRedemptionPremiumFees_e04c3774-d536-49b0-a792-8a0a19a11628" xlink:href="fang-20210930.xsd#fang_DebtInstrumentRedemptionPremiumFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_fang_DebtInstrumentRedemptionPremiumFees_e04c3774-d536-49b0-a792-8a0a19a11628" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_391b6e5b-6788-4896-89ae-6d65589805f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_391b6e5b-6788-4896-89ae-6d65589805f0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_5952e640-bdfa-43d7-a7a8-6a98ea1afac2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_us-gaap_LongTermDebtFairValue_5952e640-bdfa-43d7-a7a8-6a98ea1afac2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_070d39e3-5fa7-4d9e-9c38-428121c176f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_070d39e3-5fa7-4d9e-9c38-428121c176f0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_7318d81f-e1ac-4aff-b0ec-20c8e3fb343c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentRepurchasedFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_7318d81f-e1ac-4aff-b0ec-20c8e3fb343c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RepurchaseOfDebtPercentageOfOutstandingDebt_c1be60cb-b672-48b2-9bc4-2573661940b8" xlink:href="fang-20210930.xsd#fang_RepurchaseOfDebtPercentageOfOutstandingDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_fang_RepurchaseOfDebtPercentageOfOutstandingDebt_c1be60cb-b672-48b2-9bc4-2573661940b8" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtInstrumentRedemptionAmount_d225d557-2bac-4e09-ba07-84cea591b4c7" xlink:href="fang-20210930.xsd#fang_DebtInstrumentRedemptionAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_fang_DebtInstrumentRedemptionAmount_d225d557-2bac-4e09-ba07-84cea591b4c7" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtInstrumentRedemptionPaymentOfDebt_a511276f-4124-4414-983b-de740065fdf2" xlink:href="fang-20210930.xsd#fang_DebtInstrumentRedemptionPaymentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_fang_DebtInstrumentRedemptionPaymentOfDebt_a511276f-4124-4414-983b-de740065fdf2" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_d9e50fd5-65ef-42f8-beb7-95524db2a659" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d1f20e08-ffcc-4faf-b73c-d96348f1b05d" xlink:to="loc_us-gaap_DebtInstrumentTable_d9e50fd5-65ef-42f8-beb7-95524db2a659" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_ec414672-448e-494d-af09-a7f538be9a2b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d9e50fd5-65ef-42f8-beb7-95524db2a659" xlink:to="loc_us-gaap_DebtInstrumentAxis_ec414672-448e-494d-af09-a7f538be9a2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_ec414672-448e-494d-af09-a7f538be9a2b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_ec414672-448e-494d-af09-a7f538be9a2b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_ec414672-448e-494d-af09-a7f538be9a2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0f8ee1c5-7057-4016-b871-c3153d9c6a51" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_ec414672-448e-494d-af09-a7f538be9a2b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0f8ee1c5-7057-4016-b871-c3153d9c6a51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPNotesMember_6f3926b6-dacf-4266-bfd7-cf19da1a539a" xlink:href="fang-20210930.xsd#fang_QEPNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_0f8ee1c5-7057-4016-b871-c3153d9c6a51" xlink:to="loc_fang_QEPNotesMember_6f3926b6-dacf-4266-bfd7-cf19da1a539a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5375SeniorNotesDue2022Member_e0510f4c-d383-4505-a492-cb0f0093b048" xlink:href="fang-20210930.xsd#fang_A5375SeniorNotesDue2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_QEPNotesMember_6f3926b6-dacf-4266-bfd7-cf19da1a539a" xlink:to="loc_fang_A5375SeniorNotesDue2022Member_e0510f4c-d383-4505-a492-cb0f0093b048" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5250SeniorNotesDue2023Member_afd14155-10a2-4735-83d9-344507da801f" xlink:href="fang-20210930.xsd#fang_A5250SeniorNotesDue2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_QEPNotesMember_6f3926b6-dacf-4266-bfd7-cf19da1a539a" xlink:to="loc_fang_A5250SeniorNotesDue2023Member_afd14155-10a2-4735-83d9-344507da801f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5625SeniorNotesDue2026Member_36e631ff-0348-41ae-a67a-aecaad0a51fb" xlink:href="fang-20210930.xsd#fang_A5625SeniorNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_QEPNotesMember_6f3926b6-dacf-4266-bfd7-cf19da1a539a" xlink:to="loc_fang_A5625SeniorNotesDue2026Member_36e631ff-0348-41ae-a67a-aecaad0a51fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A5.375SeniorNotesDue2025Member_0d663d15-2e02-459d-bce3-7af4d9fcdd8b" xlink:href="fang-20210930.xsd#fang_A5.375SeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_0f8ee1c5-7057-4016-b871-c3153d9c6a51" xlink:to="loc_fang_A5.375SeniorNotesDue2025Member_0d663d15-2e02-459d-bce3-7af4d9fcdd8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A4.625Notesdue2021Member_ee972157-5c69-4296-acd7-151b80b70cac" xlink:href="fang-20210930.xsd#fang_A4.625Notesdue2021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_0f8ee1c5-7057-4016-b871-c3153d9c6a51" xlink:to="loc_fang_A4.625Notesdue2021Member_ee972157-5c69-4296-acd7-151b80b70cac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtRepurchasesAxis_ccc19f49-027c-40fe-a992-6d0e65de171e" xlink:href="fang-20210930.xsd#fang_DebtRepurchasesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d9e50fd5-65ef-42f8-beb7-95524db2a659" xlink:to="loc_fang_DebtRepurchasesAxis_ccc19f49-027c-40fe-a992-6d0e65de171e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtRepurchasesDomain_ccc19f49-027c-40fe-a992-6d0e65de171e_default" xlink:href="fang-20210930.xsd#fang_DebtRepurchasesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fang_DebtRepurchasesAxis_ccc19f49-027c-40fe-a992-6d0e65de171e" xlink:to="loc_fang_DebtRepurchasesDomain_ccc19f49-027c-40fe-a992-6d0e65de171e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtRepurchasesDomain_b7c4a9a9-907f-4769-958e-e1b5ac567ac4" xlink:href="fang-20210930.xsd#fang_DebtRepurchasesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fang_DebtRepurchasesAxis_ccc19f49-027c-40fe-a992-6d0e65de171e" xlink:to="loc_fang_DebtRepurchasesDomain_b7c4a9a9-907f-4769-958e-e1b5ac567ac4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtRepurchasedInMarch2021Member_39603fa7-60ec-4ce8-b895-95e17d1dea84" xlink:href="fang-20210930.xsd#fang_DebtRepurchasedInMarch2021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DebtRepurchasesDomain_b7c4a9a9-907f-4769-958e-e1b5ac567ac4" xlink:to="loc_fang_DebtRepurchasedInMarch2021Member_39603fa7-60ec-4ce8-b895-95e17d1dea84" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtRepurchasedInAugust2021Member_3d7c0466-8b80-46fc-96fa-52fd9273921e" xlink:href="fang-20210930.xsd#fang_DebtRepurchasedInAugust2021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DebtRepurchasesDomain_b7c4a9a9-907f-4769-958e-e1b5ac567ac4" xlink:to="loc_fang_DebtRepurchasedInAugust2021Member_3d7c0466-8b80-46fc-96fa-52fd9273921e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DebtEnergenNotesDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DebtEnergenNotesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DebtEnergenNotesDetails" xlink:type="extended" id="ic455d4261c4244daac99751f822a4418_DebtEnergenNotesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_772703dd-59e2-4010-bf7f-f54e20a50af8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_4b91a0b3-2e2b-4bbb-8225-c9e2b505baa7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_772703dd-59e2-4010-bf7f-f54e20a50af8" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_4b91a0b3-2e2b-4bbb-8225-c9e2b505baa7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_c9874586-e9e3-4be9-a8fc-17206b313b29" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_772703dd-59e2-4010-bf7f-f54e20a50af8" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_c9874586-e9e3-4be9-a8fc-17206b313b29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_d56b0b77-d5c0-46c8-8b89-7687916d1bcc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_772703dd-59e2-4010-bf7f-f54e20a50af8" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_d56b0b77-d5c0-46c8-8b89-7687916d1bcc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_46ffb2a5-b9a8-4606-94ed-e2fb57b08e5a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_d56b0b77-d5c0-46c8-8b89-7687916d1bcc" xlink:to="loc_us-gaap_DebtInstrumentAxis_46ffb2a5-b9a8-4606-94ed-e2fb57b08e5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_46ffb2a5-b9a8-4606-94ed-e2fb57b08e5a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_46ffb2a5-b9a8-4606-94ed-e2fb57b08e5a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_46ffb2a5-b9a8-4606-94ed-e2fb57b08e5a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c10abfd7-b0af-4737-8642-270d5710310f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_46ffb2a5-b9a8-4606-94ed-e2fb57b08e5a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c10abfd7-b0af-4737-8642-270d5710310f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A7.125MediumTermNotesSeriesBMember_8e0033c8-575b-4bb8-af17-58adea7534c8" xlink:href="fang-20210930.xsd#fang_A7.125MediumTermNotesSeriesBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c10abfd7-b0af-4737-8642-270d5710310f" xlink:to="loc_fang_A7.125MediumTermNotesSeriesBMember_8e0033c8-575b-4bb8-af17-58adea7534c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A7.32MediumTermSeriesAdue2022Member_b1c530a4-6875-4957-bfd7-4b1f4f9ddafc" xlink:href="fang-20210930.xsd#fang_A7.32MediumTermSeriesAdue2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c10abfd7-b0af-4737-8642-270d5710310f" xlink:to="loc_fang_A7.32MediumTermSeriesAdue2022Member_b1c530a4-6875-4957-bfd7-4b1f4f9ddafc" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTVipersCreditAgreementDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DEBTVipersCreditAgreementDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTVipersCreditAgreementDetails" xlink:type="extended" id="if9dd6026780a406bbcaf479e4985f5cb_DEBTVipersCreditAgreementDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_ac3387d2-3bbd-48e8-9e31-cdc0cb8277d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_724fdbed-976b-4aa6-a591-1fd92c1fc354" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_ac3387d2-3bbd-48e8-9e31-cdc0cb8277d2" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_724fdbed-976b-4aa6-a591-1fd92c1fc354" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_40d69623-9953-4b09-8378-f25835c2411d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_ac3387d2-3bbd-48e8-9e31-cdc0cb8277d2" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_40d69623-9953-4b09-8378-f25835c2411d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_a264a70b-271f-4600-bbbe-56f10176d1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_ac3387d2-3bbd-48e8-9e31-cdc0cb8277d2" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_a264a70b-271f-4600-bbbe-56f10176d1b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_9662892a-1eed-4843-9ce5-059fd6d42e01" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_ac3387d2-3bbd-48e8-9e31-cdc0cb8277d2" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_9662892a-1eed-4843-9ce5-059fd6d42e01" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_72f40b93-c818-4ec1-a2b8-137ed6b53a49" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtWeightedAverageInterestRateOverTime"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_ac3387d2-3bbd-48e8-9e31-cdc0cb8277d2" xlink:to="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_72f40b93-c818-4ec1-a2b8-137ed6b53a49" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_8c079bde-2570-47a0-af3c-15a1863f5b55" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_ac3387d2-3bbd-48e8-9e31-cdc0cb8277d2" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_8c079bde-2570-47a0-af3c-15a1863f5b55" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_21b6b8d9-c985-43b1-ae35-6d036806078b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_8c079bde-2570-47a0-af3c-15a1863f5b55" xlink:to="loc_us-gaap_DebtInstrumentAxis_21b6b8d9-c985-43b1-ae35-6d036806078b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_21b6b8d9-c985-43b1-ae35-6d036806078b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_21b6b8d9-c985-43b1-ae35-6d036806078b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_21b6b8d9-c985-43b1-ae35-6d036806078b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_30f2b10e-a3e7-4180-9511-ae7a0f3f78c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_21b6b8d9-c985-43b1-ae35-6d036806078b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_30f2b10e-a3e7-4180-9511-ae7a0f3f78c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperCreditFacilityMember_bc70c65b-267c-4240-bfe7-2bc8667f956d" xlink:href="fang-20210930.xsd#fang_ViperCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_30f2b10e-a3e7-4180-9511-ae7a0f3f78c8" xlink:to="loc_fang_ViperCreditFacilityMember_bc70c65b-267c-4240-bfe7-2bc8667f956d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_6db8cbc8-cae8-41ae-9f58-4fb41594b47f" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_8c079bde-2570-47a0-af3c-15a1863f5b55" xlink:to="loc_dei_LegalEntityAxis_6db8cbc8-cae8-41ae-9f58-4fb41594b47f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6db8cbc8-cae8-41ae-9f58-4fb41594b47f_default" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_6db8cbc8-cae8-41ae-9f58-4fb41594b47f" xlink:to="loc_dei_EntityDomain_6db8cbc8-cae8-41ae-9f58-4fb41594b47f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_59377131-093c-42d1-85ad-fa7e24791c33" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_6db8cbc8-cae8-41ae-9f58-4fb41594b47f" xlink:to="loc_dei_EntityDomain_59377131-093c-42d1-85ad-fa7e24791c33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperEnergyPartnersLPMember_5b7eff79-c8d9-40be-8494-798c61a4c864" xlink:href="fang-20210930.xsd#fang_ViperEnergyPartnersLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_59377131-093c-42d1-85ad-fa7e24791c33" xlink:to="loc_fang_ViperEnergyPartnersLPMember_5b7eff79-c8d9-40be-8494-798c61a4c864" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DEBTRattlersCreditAgreementDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DEBTRattlersCreditAgreementDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DEBTRattlersCreditAgreementDetails" xlink:type="extended" id="iec9140e6a4444e9d8525e62db76366dd_DEBTRattlersCreditAgreementDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_a7e35b2a-32da-4560-91e6-44d8013ea91a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_14e28d09-6db6-4b5f-8cc4-41a3144f969d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_a7e35b2a-32da-4560-91e6-44d8013ea91a" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_14e28d09-6db6-4b5f-8cc4-41a3144f969d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_LineofCreditFacilityMaximumBorrowingCapacitySubjectToCommitments_849c2cdb-68f3-4d6d-86b8-016d7ea44f0a" xlink:href="fang-20210930.xsd#fang_LineofCreditFacilityMaximumBorrowingCapacitySubjectToCommitments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_a7e35b2a-32da-4560-91e6-44d8013ea91a" xlink:to="loc_fang_LineofCreditFacilityMaximumBorrowingCapacitySubjectToCommitments_849c2cdb-68f3-4d6d-86b8-016d7ea44f0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_6abc5ad7-4917-41de-a256-56bb5ac4b123" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_a7e35b2a-32da-4560-91e6-44d8013ea91a" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_6abc5ad7-4917-41de-a256-56bb5ac4b123" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_6b515675-9aa0-4461-a051-027760c6e12b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_a7e35b2a-32da-4560-91e6-44d8013ea91a" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_6b515675-9aa0-4461-a051-027760c6e12b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_8f35e4f4-47eb-4435-88c7-e0758f438b9e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtWeightedAverageInterestRateOverTime"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_a7e35b2a-32da-4560-91e6-44d8013ea91a" xlink:to="loc_us-gaap_LongTermDebtWeightedAverageInterestRateOverTime_8f35e4f4-47eb-4435-88c7-e0758f438b9e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_f4a50db0-6068-472d-9d45-6b038d555670" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_a7e35b2a-32da-4560-91e6-44d8013ea91a" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_f4a50db0-6068-472d-9d45-6b038d555670" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_88f403df-afcf-40c6-9335-1f34750a6cd0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_f4a50db0-6068-472d-9d45-6b038d555670" xlink:to="loc_us-gaap_DebtInstrumentAxis_88f403df-afcf-40c6-9335-1f34750a6cd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_88f403df-afcf-40c6-9335-1f34750a6cd0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_88f403df-afcf-40c6-9335-1f34750a6cd0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_88f403df-afcf-40c6-9335-1f34750a6cd0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_4c39088e-ff7d-4e22-a222-2966d19d7e35" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_88f403df-afcf-40c6-9335-1f34750a6cd0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_4c39088e-ff7d-4e22-a222-2966d19d7e35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerCreditFacilityMember_01ed7be9-0ca6-41de-9617-4f95102151e1" xlink:href="fang-20210930.xsd#fang_RattlerCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_4c39088e-ff7d-4e22-a222-2966d19d7e35" xlink:to="loc_fang_RattlerCreditFacilityMember_01ed7be9-0ca6-41de-9617-4f95102151e1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_1f61fe53-9161-4c4b-acb2-8b396c76f4e1" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_f4a50db0-6068-472d-9d45-6b038d555670" xlink:to="loc_dei_LegalEntityAxis_1f61fe53-9161-4c4b-acb2-8b396c76f4e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_1f61fe53-9161-4c4b-acb2-8b396c76f4e1_default" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1f61fe53-9161-4c4b-acb2-8b396c76f4e1" xlink:to="loc_dei_EntityDomain_1f61fe53-9161-4c4b-acb2-8b396c76f4e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3c0a1f29-2015-4d28-9f3c-ce443d08755e" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1f61fe53-9161-4c4b-acb2-8b396c76f4e1" xlink:to="loc_dei_EntityDomain_3c0a1f29-2015-4d28-9f3c-ce443d08755e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlerLLCMember_b423c404-3e3b-40e6-8fc6-68020921056a" xlink:href="fang-20210930.xsd#fang_RattlerLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3c0a1f29-2015-4d28-9f3c-ce443d08755e" xlink:to="loc_fang_RattlerLLCMember_b423c404-3e3b-40e6-8fc6-68020921056a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHARENarrativeDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#CAPITALSTOCKANDEARNINGSPERSHARENarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHARENarrativeDetails" xlink:type="extended" id="i22bf78eaec1941f2904be59b6d779380_CAPITALSTOCKANDEARNINGSPERSHARENarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_303e72c0-ffb3-44c3-8333-eb31d1ca38dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_2c98db9c-8b18-4a17-acd0-fdc64e061453" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_303e72c0-ffb3-44c3-8333-eb31d1ca38dd" xlink:to="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_2c98db9c-8b18-4a17-acd0-fdc64e061453" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_da9b9ae1-0fad-4a14-bb33-0d5063096229" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_303e72c0-ffb3-44c3-8333-eb31d1ca38dd" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_da9b9ae1-0fad-4a14-bb33-0d5063096229" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_90e35862-132d-4345-afe9-2b691f4ce0c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_da9b9ae1-0fad-4a14-bb33-0d5063096229" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_90e35862-132d-4345-afe9-2b691f4ce0c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_90e35862-132d-4345-afe9-2b691f4ce0c6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_90e35862-132d-4345-afe9-2b691f4ce0c6" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_90e35862-132d-4345-afe9-2b691f4ce0c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4370d238-e0aa-46cd-9c56-80ed2408e873" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_90e35862-132d-4345-afe9-2b691f4ce0c6" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4370d238-e0aa-46cd-9c56-80ed2408e873" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_636a408b-7766-4e3a-befd-abc9b542824b" xlink:href="fang-20210930.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4370d238-e0aa-46cd-9c56-80ed2408e873" xlink:to="loc_fang_QEPResourcesIncMember_636a408b-7766-4e3a-befd-abc9b542824b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GuidonOperatingLLCMember_0fd857d7-0043-41b5-b3c6-c7de797f3ba4" xlink:href="fang-20210930.xsd#fang_GuidonOperatingLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_4370d238-e0aa-46cd-9c56-80ed2408e873" xlink:to="loc_fang_GuidonOperatingLLCMember_0fd857d7-0043-41b5-b3c6-c7de797f3ba4" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHAREChangeinOwnershipofConsolidatedSubsidiariesDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#CAPITALSTOCKANDEARNINGSPERSHAREChangeinOwnershipofConsolidatedSubsidiariesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/CAPITALSTOCKANDEARNINGSPERSHAREChangeinOwnershipofConsolidatedSubsidiariesDetails" xlink:type="extended" id="ifbedd326523449b0a74fc8ea36d456e9_CAPITALSTOCKANDEARNINGSPERSHAREChangeinOwnershipofConsolidatedSubsidiariesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_2471d5b1-76cd-4830-97ac-d20d41459a16" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_63f7afa2-4429-4bea-8e70-04158c2190c4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_2471d5b1-76cd-4830-97ac-d20d41459a16" xlink:to="loc_us-gaap_NetIncomeLoss_63f7afa2-4429-4bea-8e70-04158c2190c4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet_b3de6afd-00f6-4d88-8bd6-816f57a52e1e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_2471d5b1-76cd-4830-97ac-d20d41459a16" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet_b3de6afd-00f6-4d88-8bd6-816f57a52e1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_b4d36d56-36cc-4af7-ab06-e6786b0a7c13" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_2471d5b1-76cd-4830-97ac-d20d41459a16" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_b4d36d56-36cc-4af7-ab06-e6786b0a7c13" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_81b69450-7c61-4bad-8000-e76c79209719" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_2471d5b1-76cd-4830-97ac-d20d41459a16" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_81b69450-7c61-4bad-8000-e76c79209719" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_55db5009-a248-4d0e-8d42-f493ba8b8c3c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_81b69450-7c61-4bad-8000-e76c79209719" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_55db5009-a248-4d0e-8d42-f493ba8b8c3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_55db5009-a248-4d0e-8d42-f493ba8b8c3c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_55db5009-a248-4d0e-8d42-f493ba8b8c3c" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_55db5009-a248-4d0e-8d42-f493ba8b8c3c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_038fcdac-cb8f-4229-9727-1dae2bb12c01" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_55db5009-a248-4d0e-8d42-f493ba8b8c3c" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_038fcdac-cb8f-4229-9727-1dae2bb12c01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnerMember_2825f74b-74b5-4502-9bc7-66f9e999cd1a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LimitedPartnerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_038fcdac-cb8f-4229-9727-1dae2bb12c01" xlink:to="loc_us-gaap_LimitedPartnerMember_2825f74b-74b5-4502-9bc7-66f9e999cd1a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONNarrativesDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#EQUITYBASEDCOMPENSATIONNarrativesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONNarrativesDetails" xlink:type="extended" id="i8956b3844ef6495fbacb8d1a9b39b989_EQUITYBASEDCOMPENSATIONNarrativesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_063c407e-5b2e-4954-992a-133ecf446996" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_7e9f907e-29aa-4baa-82fc-278978ebd89d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_063c407e-5b2e-4954-992a-133ecf446996" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_7e9f907e-29aa-4baa-82fc-278978ebd89d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_955316ed-014d-4dd6-9fbf-5ce62744bcf6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_063c407e-5b2e-4954-992a-133ecf446996" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_955316ed-014d-4dd6-9fbf-5ce62744bcf6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c7facbde-b3ba-41d9-acad-7f1f928598ce" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_063c407e-5b2e-4954-992a-133ecf446996" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c7facbde-b3ba-41d9-acad-7f1f928598ce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_155f5eae-02dd-4d26-8aae-9563498aeee6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c7facbde-b3ba-41d9-acad-7f1f928598ce" xlink:to="loc_us-gaap_PlanNameAxis_155f5eae-02dd-4d26-8aae-9563498aeee6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_155f5eae-02dd-4d26-8aae-9563498aeee6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_155f5eae-02dd-4d26-8aae-9563498aeee6" xlink:to="loc_us-gaap_PlanNameDomain_155f5eae-02dd-4d26-8aae-9563498aeee6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_023d901d-5ad2-4a62-a5ea-b29782886387" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_155f5eae-02dd-4d26-8aae-9563498aeee6" xlink:to="loc_us-gaap_PlanNameDomain_023d901d-5ad2-4a62-a5ea-b29782886387" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_d60ac2d5-7c26-4e07-957a-e79816bccdbe" xlink:href="fang-20210930.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_023d901d-5ad2-4a62-a5ea-b29782886387" xlink:to="loc_fang_EquityPlanMember_d60ac2d5-7c26-4e07-957a-e79816bccdbe" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONScheduleofStockBasedCompensationPlansandRelatedCostsDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#EQUITYBASEDCOMPENSATIONScheduleofStockBasedCompensationPlansandRelatedCostsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONScheduleofStockBasedCompensationPlansandRelatedCostsDetails" xlink:type="extended" id="i621c1a4929ff4222a5ee85a729fd3987_EQUITYBASEDCOMPENSATIONScheduleofStockBasedCompensationPlansandRelatedCostsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_832db94d-72dd-40fc-8482-c1dafbcf1544" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_b152ad07-2ed2-44e4-9b16-6dc7e138445c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_832db94d-72dd-40fc-8482-c1dafbcf1544" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_b152ad07-2ed2-44e4-9b16-6dc7e138445c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_734b87e0-c3b2-423a-9586-17efc45423b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_832db94d-72dd-40fc-8482-c1dafbcf1544" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_734b87e0-c3b2-423a-9586-17efc45423b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_adc52e4b-ceb9-4cbf-97eb-3d35f8530022" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_832db94d-72dd-40fc-8482-c1dafbcf1544" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_adc52e4b-ceb9-4cbf-97eb-3d35f8530022" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_65895f96-7296-4f0f-9293-0a8c20cd22b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_adc52e4b-ceb9-4cbf-97eb-3d35f8530022" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_65895f96-7296-4f0f-9293-0a8c20cd22b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_65895f96-7296-4f0f-9293-0a8c20cd22b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_65895f96-7296-4f0f-9293-0a8c20cd22b0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_65895f96-7296-4f0f-9293-0a8c20cd22b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_13d12d4c-432a-4afc-a65f-e87b76b6dd22" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_65895f96-7296-4f0f-9293-0a8c20cd22b0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_13d12d4c-432a-4afc-a65f-e87b76b6dd22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_c9966872-157c-423c-bd65-dfd08228adbb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_13d12d4c-432a-4afc-a65f-e87b76b6dd22" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_c9966872-157c-423c-bd65-dfd08228adbb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRestrictedStockUnitsDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#EQUITYBASEDCOMPENSATIONRestrictedStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRestrictedStockUnitsDetails" xlink:type="extended" id="i9896bd438e7648ab84ccef465fc9f3aa_EQUITYBASEDCOMPENSATIONRestrictedStockUnitsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fbe047e6-0044-4553-902e-194ffefe18ba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9f696f1c-9147-4b30-9e32-d1fd81f250fd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fbe047e6-0044-4553-902e-194ffefe18ba" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9f696f1c-9147-4b30-9e32-d1fd81f250fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_c1c6498d-0f01-4843-b171-67e0bb8ffc3b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9f696f1c-9147-4b30-9e32-d1fd81f250fd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_c1c6498d-0f01-4843-b171-67e0bb8ffc3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_53046319-a9e7-4158-a294-afa8b742ea23" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9f696f1c-9147-4b30-9e32-d1fd81f250fd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_53046319-a9e7-4158-a294-afa8b742ea23" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_d4772326-517f-4eaf-b297-5fe1ff1c4d80" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9f696f1c-9147-4b30-9e32-d1fd81f250fd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_d4772326-517f-4eaf-b297-5fe1ff1c4d80" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_a2b1c183-592b-49ab-a3a3-1cdff3af766a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9f696f1c-9147-4b30-9e32-d1fd81f250fd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_a2b1c183-592b-49ab-a3a3-1cdff3af766a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_f570a38d-62d3-4f03-91be-298760d87d3e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_e5c44938-1b52-4750-b67e-aaa78c43abfa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fbe047e6-0044-4553-902e-194ffefe18ba" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_e5c44938-1b52-4750-b67e-aaa78c43abfa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_4f542c3e-085c-4724-a15b-cca5f7954b76" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_e5c44938-1b52-4750-b67e-aaa78c43abfa" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_4f542c3e-085c-4724-a15b-cca5f7954b76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_452715a0-4ace-47ab-962a-095a4fb34f52" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_e5c44938-1b52-4750-b67e-aaa78c43abfa" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_452715a0-4ace-47ab-962a-095a4fb34f52" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9bd88e3d-75a9-46bd-9a33-ae8eb6f921f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_e5c44938-1b52-4750-b67e-aaa78c43abfa" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9bd88e3d-75a9-46bd-9a33-ae8eb6f921f4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_45196424-67d4-478a-9b6b-f52b366a8cdf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_e5c44938-1b52-4750-b67e-aaa78c43abfa" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_45196424-67d4-478a-9b6b-f52b366a8cdf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_e25249c2-4ed9-462f-998e-d6baa76bec99" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ef256eb3-e2e5-4200-9417-c52ae66ae567" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fbe047e6-0044-4553-902e-194ffefe18ba" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ef256eb3-e2e5-4200-9417-c52ae66ae567" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_e884f1ba-ec52-4bc5-a3f4-6c28be2f3c28" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ef256eb3-e2e5-4200-9417-c52ae66ae567" xlink:to="loc_us-gaap_PlanNameAxis_e884f1ba-ec52-4bc5-a3f4-6c28be2f3c28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_e884f1ba-ec52-4bc5-a3f4-6c28be2f3c28_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_e884f1ba-ec52-4bc5-a3f4-6c28be2f3c28" xlink:to="loc_us-gaap_PlanNameDomain_e884f1ba-ec52-4bc5-a3f4-6c28be2f3c28_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_637aab93-d1d0-43b2-8520-5ee41c976276" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_e884f1ba-ec52-4bc5-a3f4-6c28be2f3c28" xlink:to="loc_us-gaap_PlanNameDomain_637aab93-d1d0-43b2-8520-5ee41c976276" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_6558566a-6a3e-4dd4-8aea-9a83b98d5696" xlink:href="fang-20210930.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_637aab93-d1d0-43b2-8520-5ee41c976276" xlink:to="loc_fang_EquityPlanMember_6558566a-6a3e-4dd4-8aea-9a83b98d5696" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_2a37f95c-52fa-44f8-8082-03ddb0ce2799" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ef256eb3-e2e5-4200-9417-c52ae66ae567" xlink:to="loc_us-gaap_AwardTypeAxis_2a37f95c-52fa-44f8-8082-03ddb0ce2799" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a37f95c-52fa-44f8-8082-03ddb0ce2799_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_2a37f95c-52fa-44f8-8082-03ddb0ce2799" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a37f95c-52fa-44f8-8082-03ddb0ce2799_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b92f3404-e714-4cbe-9e5d-f6f21a64a2e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_2a37f95c-52fa-44f8-8082-03ddb0ce2799" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b92f3404-e714-4cbe-9e5d-f6f21a64a2e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_6e5bb95f-b690-466b-bfe2-e4b6c5cf2e34" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b92f3404-e714-4cbe-9e5d-f6f21a64a2e4" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_6e5bb95f-b690-466b-bfe2-e4b6c5cf2e34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_90df9da9-dcc8-4661-8b89-bd0070cb067b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ef256eb3-e2e5-4200-9417-c52ae66ae567" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_90df9da9-dcc8-4661-8b89-bd0070cb067b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_90df9da9-dcc8-4661-8b89-bd0070cb067b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_90df9da9-dcc8-4661-8b89-bd0070cb067b" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_90df9da9-dcc8-4661-8b89-bd0070cb067b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_815cd5f9-6475-4621-ad7b-a309ef3f0a30" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_90df9da9-dcc8-4661-8b89-bd0070cb067b" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_815cd5f9-6475-4621-ad7b-a309ef3f0a30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_3592cc92-c2d4-4031-adfa-589d6f8c2a6a" xlink:href="fang-20210930.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_815cd5f9-6475-4621-ad7b-a309ef3f0a30" xlink:to="loc_fang_QEPResourcesIncMember_3592cc92-c2d4-4031-adfa-589d6f8c2a6a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRestrictedStockUnitsNarrativesDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#EQUITYBASEDCOMPENSATIONRestrictedStockUnitsNarrativesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONRestrictedStockUnitsNarrativesDetails" xlink:type="extended" id="ibb06646358ee4fbab2d42ef7c5b35667_EQUITYBASEDCOMPENSATIONRestrictedStockUnitsNarrativesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ae13f7c6-ed5a-4c8a-be55-e6eda158ad61" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_c6ed353c-8a98-4b60-a830-52db3006a67c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ae13f7c6-ed5a-4c8a-be55-e6eda158ad61" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_c6ed353c-8a98-4b60-a830-52db3006a67c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_b796a8ae-bd81-4fde-9ee3-2d2a1f54443a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ae13f7c6-ed5a-4c8a-be55-e6eda158ad61" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_b796a8ae-bd81-4fde-9ee3-2d2a1f54443a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_d0cdadb1-67bd-4211-8378-2960c3215dfa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ae13f7c6-ed5a-4c8a-be55-e6eda158ad61" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_d0cdadb1-67bd-4211-8378-2960c3215dfa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bb810c22-ff5c-4c20-a46b-02db4943a069" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ae13f7c6-ed5a-4c8a-be55-e6eda158ad61" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bb810c22-ff5c-4c20-a46b-02db4943a069" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_9c009e9d-f21f-4557-a50f-229546fb872e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bb810c22-ff5c-4c20-a46b-02db4943a069" xlink:to="loc_us-gaap_AwardTypeAxis_9c009e9d-f21f-4557-a50f-229546fb872e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9c009e9d-f21f-4557-a50f-229546fb872e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_9c009e9d-f21f-4557-a50f-229546fb872e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9c009e9d-f21f-4557-a50f-229546fb872e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e19bbaae-b1df-4363-b560-6d32e0cce607" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_9c009e9d-f21f-4557-a50f-229546fb872e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e19bbaae-b1df-4363-b560-6d32e0cce607" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_44d8d1a9-936b-48a4-a53d-57f56351ba7d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e19bbaae-b1df-4363-b560-6d32e0cce607" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_44d8d1a9-936b-48a4-a53d-57f56351ba7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_c4e21859-0501-467c-a037-8e4351792a8b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bb810c22-ff5c-4c20-a46b-02db4943a069" xlink:to="loc_us-gaap_PlanNameAxis_c4e21859-0501-467c-a037-8e4351792a8b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_c4e21859-0501-467c-a037-8e4351792a8b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_c4e21859-0501-467c-a037-8e4351792a8b" xlink:to="loc_us-gaap_PlanNameDomain_c4e21859-0501-467c-a037-8e4351792a8b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_d07fc3b7-8981-4eaa-8dca-e43ce4b70185" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_c4e21859-0501-467c-a037-8e4351792a8b" xlink:to="loc_us-gaap_PlanNameDomain_d07fc3b7-8981-4eaa-8dca-e43ce4b70185" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_0c6e4ea1-d7ac-4c2d-b889-6e231f9a2458" xlink:href="fang-20210930.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_d07fc3b7-8981-4eaa-8dca-e43ce4b70185" xlink:to="loc_fang_EquityPlanMember_0c6e4ea1-d7ac-4c2d-b889-6e231f9a2458" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONPerformanceRestrictedStockActivityDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#EQUITYBASEDCOMPENSATIONPerformanceRestrictedStockActivityDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONPerformanceRestrictedStockActivityDetails" xlink:type="extended" id="i4afc0b44f416450ab03d7858f4ae14ae_EQUITYBASEDCOMPENSATIONPerformanceRestrictedStockActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1091ff55-049a-45b4-ac14-7e68742be1a5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_2868c0a0-e700-46b2-9470-76a1b1a986ec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1091ff55-049a-45b4-ac14-7e68742be1a5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_2868c0a0-e700-46b2-9470-76a1b1a986ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_98186718-a2aa-441b-a5b6-c4cec4e63fde" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_2868c0a0-e700-46b2-9470-76a1b1a986ec" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_98186718-a2aa-441b-a5b6-c4cec4e63fde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_fb12d250-73e2-4202-825c-12d74aa87ba4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_2868c0a0-e700-46b2-9470-76a1b1a986ec" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_fb12d250-73e2-4202-825c-12d74aa87ba4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_893da750-07c7-4afe-a42a-c57abf033577" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_dd1d9a93-7a2a-46df-bf63-8ca5c05d5980" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1091ff55-049a-45b4-ac14-7e68742be1a5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_dd1d9a93-7a2a-46df-bf63-8ca5c05d5980" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_eea32277-f5d7-4860-8ae0-4f16cf5e8148" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_dd1d9a93-7a2a-46df-bf63-8ca5c05d5980" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_eea32277-f5d7-4860-8ae0-4f16cf5e8148" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_0bda210c-bc6f-4c0e-bcc3-81f7270396ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_dd1d9a93-7a2a-46df-bf63-8ca5c05d5980" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_0bda210c-bc6f-4c0e-bcc3-81f7270396ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_d7c7f42b-05e5-4e9f-97af-0b1c7834f40d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ShareBasedCompensationArrangementbyShareBasedPaymentMaximumAwardPotential_f8b0a4f8-8d39-4a91-a1bb-f6645b61569a" xlink:href="fang-20210930.xsd#fang_ShareBasedCompensationArrangementbyShareBasedPaymentMaximumAwardPotential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1091ff55-049a-45b4-ac14-7e68742be1a5" xlink:to="loc_fang_ShareBasedCompensationArrangementbyShareBasedPaymentMaximumAwardPotential_f8b0a4f8-8d39-4a91-a1bb-f6645b61569a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_28da3e58-b537-4b2c-8972-6921962d6ba5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1091ff55-049a-45b4-ac14-7e68742be1a5" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_28da3e58-b537-4b2c-8972-6921962d6ba5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_ed9a0438-b353-438c-96b1-a18a36e42532" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_28da3e58-b537-4b2c-8972-6921962d6ba5" xlink:to="loc_us-gaap_PlanNameAxis_ed9a0438-b353-438c-96b1-a18a36e42532" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_ed9a0438-b353-438c-96b1-a18a36e42532_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_ed9a0438-b353-438c-96b1-a18a36e42532" xlink:to="loc_us-gaap_PlanNameDomain_ed9a0438-b353-438c-96b1-a18a36e42532_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_21c772a6-6957-4880-ab1d-a4a6b3897056" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_ed9a0438-b353-438c-96b1-a18a36e42532" xlink:to="loc_us-gaap_PlanNameDomain_21c772a6-6957-4880-ab1d-a4a6b3897056" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_9236f4f0-6795-4d05-8d85-3c524b4db439" xlink:href="fang-20210930.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_21c772a6-6957-4880-ab1d-a4a6b3897056" xlink:to="loc_fang_EquityPlanMember_9236f4f0-6795-4d05-8d85-3c524b4db439" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_16e4e941-f822-4e5f-82e6-92630b2d5546" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_28da3e58-b537-4b2c-8972-6921962d6ba5" xlink:to="loc_us-gaap_AwardTypeAxis_16e4e941-f822-4e5f-82e6-92630b2d5546" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_16e4e941-f822-4e5f-82e6-92630b2d5546_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_16e4e941-f822-4e5f-82e6-92630b2d5546" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_16e4e941-f822-4e5f-82e6-92630b2d5546_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ea8d70d0-30cc-4949-8349-17c33f5d9609" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_16e4e941-f822-4e5f-82e6-92630b2d5546" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ea8d70d0-30cc-4949-8349-17c33f5d9609" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_36889b27-0236-41d5-bb60-c37702292716" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ea8d70d0-30cc-4949-8349-17c33f5d9609" xlink:to="loc_us-gaap_PerformanceSharesMember_36889b27-0236-41d5-bb60-c37702292716" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONPerformanceBasedRestrictedStockUnitsNarrativesDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#EQUITYBASEDCOMPENSATIONPerformanceBasedRestrictedStockUnitsNarrativesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONPerformanceBasedRestrictedStockUnitsNarrativesDetails" xlink:type="extended" id="i00d6d733c79e46daa41cbd705f7cac55_EQUITYBASEDCOMPENSATIONPerformanceBasedRestrictedStockUnitsNarrativesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_78f38f77-c117-4568-bab5-35d7754ea20f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_53928910-c02a-4a2f-91a9-34c13036edb6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_78f38f77-c117-4568-bab5-35d7754ea20f" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_53928910-c02a-4a2f-91a9-34c13036edb6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_a9391ab8-ce4e-419a-b5d9-9e51db348f75" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_78f38f77-c117-4568-bab5-35d7754ea20f" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_a9391ab8-ce4e-419a-b5d9-9e51db348f75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_edfbb749-a7ee-4e7b-8061-cc3a29116e1c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_78f38f77-c117-4568-bab5-35d7754ea20f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_edfbb749-a7ee-4e7b-8061-cc3a29116e1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorizedPercentofSharesGranted_c3d6bb87-e8df-4b25-8406-9129d8baa557" xlink:href="fang-20210930.xsd#fang_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorizedPercentofSharesGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_78f38f77-c117-4568-bab5-35d7754ea20f" xlink:to="loc_fang_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorizedPercentofSharesGranted_c3d6bb87-e8df-4b25-8406-9129d8baa557" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_0ae96705-26c6-47a5-b7cf-200c95afb05a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_78f38f77-c117-4568-bab5-35d7754ea20f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_0ae96705-26c6-47a5-b7cf-200c95afb05a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_eed1496d-559c-4932-94c1-45ff470e7dcc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_78f38f77-c117-4568-bab5-35d7754ea20f" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_eed1496d-559c-4932-94c1-45ff470e7dcc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_c8346e05-1613-4093-b978-9e0b5e2de924" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_eed1496d-559c-4932-94c1-45ff470e7dcc" xlink:to="loc_us-gaap_AwardTypeAxis_c8346e05-1613-4093-b978-9e0b5e2de924" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c8346e05-1613-4093-b978-9e0b5e2de924_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_c8346e05-1613-4093-b978-9e0b5e2de924" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c8346e05-1613-4093-b978-9e0b5e2de924_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad7c3f52-6a80-4164-84be-78b68b068146" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_c8346e05-1613-4093-b978-9e0b5e2de924" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad7c3f52-6a80-4164-84be-78b68b068146" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_f8c4d341-b93e-48b1-ab1d-4af3f92b049e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad7c3f52-6a80-4164-84be-78b68b068146" xlink:to="loc_us-gaap_PerformanceSharesMember_f8c4d341-b93e-48b1-ab1d-4af3f92b049e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_e3532732-fb22-4812-b23d-8771e45dfb18" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_eed1496d-559c-4932-94c1-45ff470e7dcc" xlink:to="loc_us-gaap_PlanNameAxis_e3532732-fb22-4812-b23d-8771e45dfb18" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_e3532732-fb22-4812-b23d-8771e45dfb18_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_e3532732-fb22-4812-b23d-8771e45dfb18" xlink:to="loc_us-gaap_PlanNameDomain_e3532732-fb22-4812-b23d-8771e45dfb18_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_95549aaf-2ee1-449b-8b00-ec26bf7860d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_e3532732-fb22-4812-b23d-8771e45dfb18" xlink:to="loc_us-gaap_PlanNameDomain_95549aaf-2ee1-449b-8b00-ec26bf7860d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_88875cfc-1725-4b72-a56c-897b5c03e3f3" xlink:href="fang-20210930.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_95549aaf-2ee1-449b-8b00-ec26bf7860d0" xlink:to="loc_fang_EquityPlanMember_88875cfc-1725-4b72-a56c-897b5c03e3f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_4775f412-fa64-41ff-be1a-95d7248d752d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_eed1496d-559c-4932-94c1-45ff470e7dcc" xlink:to="loc_srt_RangeAxis_4775f412-fa64-41ff-be1a-95d7248d752d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_4775f412-fa64-41ff-be1a-95d7248d752d_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_4775f412-fa64-41ff-be1a-95d7248d752d" xlink:to="loc_srt_RangeMember_4775f412-fa64-41ff-be1a-95d7248d752d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_ebf4dc6b-69c1-4582-a97d-febe7b10674c" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_4775f412-fa64-41ff-be1a-95d7248d752d" xlink:to="loc_srt_RangeMember_ebf4dc6b-69c1-4582-a97d-febe7b10674c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_fe4a80e0-e742-40ad-bfc9-26c94b154d0a" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ebf4dc6b-69c1-4582-a97d-febe7b10674c" xlink:to="loc_srt_MinimumMember_fe4a80e0-e742-40ad-bfc9-26c94b154d0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_46a4bc35-c899-4d86-bbbc-fca57588df76" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ebf4dc6b-69c1-4582-a97d-febe7b10674c" xlink:to="loc_srt_MaximumMember_46a4bc35-c899-4d86-bbbc-fca57588df76" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONValuationAssumptionsDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#EQUITYBASEDCOMPENSATIONValuationAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/EQUITYBASEDCOMPENSATIONValuationAssumptionsDetails" xlink:type="extended" id="i79216ec28f71476e8aeec77534be2af8_EQUITYBASEDCOMPENSATIONValuationAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_59a272e1-e2fb-4f91-9d84-6593a468809d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_ea1e3e00-c0fc-42be-8b3c-b7c03c3ce520" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_59a272e1-e2fb-4f91-9d84-6593a468809d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_ea1e3e00-c0fc-42be-8b3c-b7c03c3ce520" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_d9339b69-91a1-420d-8638-0b11519bf373" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_59a272e1-e2fb-4f91-9d84-6593a468809d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_d9339b69-91a1-420d-8638-0b11519bf373" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_5bd3c01c-9e6d-4340-a988-07b46015f6e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_59a272e1-e2fb-4f91-9d84-6593a468809d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_5bd3c01c-9e6d-4340-a988-07b46015f6e5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_dbeac0b4-260b-4735-ac16-f47dbc3a00ca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_59a272e1-e2fb-4f91-9d84-6593a468809d" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_dbeac0b4-260b-4735-ac16-f47dbc3a00ca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_b0c9fc14-1187-4af4-aca4-02316bb30e3d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_dbeac0b4-260b-4735-ac16-f47dbc3a00ca" xlink:to="loc_us-gaap_PlanNameAxis_b0c9fc14-1187-4af4-aca4-02316bb30e3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_b0c9fc14-1187-4af4-aca4-02316bb30e3d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_b0c9fc14-1187-4af4-aca4-02316bb30e3d" xlink:to="loc_us-gaap_PlanNameDomain_b0c9fc14-1187-4af4-aca4-02316bb30e3d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_e6afe3d5-a2b4-4e3c-b302-871a2c424011" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_b0c9fc14-1187-4af4-aca4-02316bb30e3d" xlink:to="loc_us-gaap_PlanNameDomain_e6afe3d5-a2b4-4e3c-b302-871a2c424011" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_EquityPlanMember_da346e84-c5ee-40a0-8fca-3f5644f91247" xlink:href="fang-20210930.xsd#fang_EquityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_e6afe3d5-a2b4-4e3c-b302-871a2c424011" xlink:to="loc_fang_EquityPlanMember_da346e84-c5ee-40a0-8fca-3f5644f91247" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_7c77ac00-674e-41c3-bd37-0b6667fa19ca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_dbeac0b4-260b-4735-ac16-f47dbc3a00ca" xlink:to="loc_us-gaap_AwardTypeAxis_7c77ac00-674e-41c3-bd37-0b6667fa19ca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7c77ac00-674e-41c3-bd37-0b6667fa19ca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_7c77ac00-674e-41c3-bd37-0b6667fa19ca" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7c77ac00-674e-41c3-bd37-0b6667fa19ca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_69c7ab92-14f2-43eb-afb3-f745c0faa4f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_7c77ac00-674e-41c3-bd37-0b6667fa19ca" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_69c7ab92-14f2-43eb-afb3-f745c0faa4f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_2c8f2d53-9662-4378-9497-6d509ed5b338" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_69c7ab92-14f2-43eb-afb3-f745c0faa4f6" xlink:to="loc_us-gaap_PerformanceSharesMember_2c8f2d53-9662-4378-9497-6d509ed5b338" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/INCOMETAXESDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#INCOMETAXESDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/INCOMETAXESDetails" xlink:type="extended" id="i959b0f05679c445da615b47e257a4f9b_INCOMETAXESDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_a33b8e39-8daa-4a10-9151-8e1031abf0cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c80f862a-b3ef-41c6-9c3d-aa4c703ba4df" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a33b8e39-8daa-4a10-9151-8e1031abf0cc" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c80f862a-b3ef-41c6-9c3d-aa4c703ba4df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_13c0ae68-a493-4529-8885-41ff980cead7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a33b8e39-8daa-4a10-9151-8e1031abf0cc" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_13c0ae68-a493-4529-8885-41ff980cead7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DiscreteIncomeTaxBenefitRelatedToDeferredTaxesRecordedDuringThePeriod_dab1e1c5-c715-467d-b471-95dd1d1eac56" xlink:href="fang-20210930.xsd#fang_DiscreteIncomeTaxBenefitRelatedToDeferredTaxesRecordedDuringThePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a33b8e39-8daa-4a10-9151-8e1031abf0cc" xlink:to="loc_fang_DiscreteIncomeTaxBenefitRelatedToDeferredTaxesRecordedDuringThePeriod_dab1e1c5-c715-467d-b471-95dd1d1eac56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_acf21dcb-b9a5-43c3-a383-3a04a448eb8c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a33b8e39-8daa-4a10-9151-8e1031abf0cc" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_acf21dcb-b9a5-43c3-a383-3a04a448eb8c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_637953b2-3975-49c6-a00b-ec224df00aba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a33b8e39-8daa-4a10-9151-8e1031abf0cc" xlink:to="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_637953b2-3975-49c6-a00b-ec224df00aba" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CurrentFederalTaxesReceivable_084bc8a8-602a-472f-b411-12d06a7f0557" xlink:href="fang-20210930.xsd#fang_CurrentFederalTaxesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a33b8e39-8daa-4a10-9151-8e1031abf0cc" xlink:to="loc_fang_CurrentFederalTaxesReceivable_084bc8a8-602a-472f-b411-12d06a7f0557" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_194bf73f-24ae-49ae-8a83-8051b26ef21f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_a33b8e39-8daa-4a10-9151-8e1031abf0cc" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_194bf73f-24ae-49ae-8a83-8051b26ef21f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_74f14842-9096-4469-b877-7c7de6eb9019" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_194bf73f-24ae-49ae-8a83-8051b26ef21f" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_74f14842-9096-4469-b877-7c7de6eb9019" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_74f14842-9096-4469-b877-7c7de6eb9019_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_74f14842-9096-4469-b877-7c7de6eb9019" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_74f14842-9096-4469-b877-7c7de6eb9019_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_274f231d-038b-4c7f-8eb9-a1eb335afd67" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_74f14842-9096-4469-b877-7c7de6eb9019" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_274f231d-038b-4c7f-8eb9-a1eb335afd67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_QEPResourcesIncMember_92c41a8f-46f5-4617-8c83-c59970bb3e77" xlink:href="fang-20210930.xsd#fang_QEPResourcesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_274f231d-038b-4c7f-8eb9-a1eb335afd67" xlink:to="loc_fang_QEPResourcesIncMember_92c41a8f-46f5-4617-8c83-c59970bb3e77" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_e940a723-e3f7-40dd-b328-46864f67dfd6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_194bf73f-24ae-49ae-8a83-8051b26ef21f" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_e940a723-e3f7-40dd-b328-46864f67dfd6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_e940a723-e3f7-40dd-b328-46864f67dfd6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_e940a723-e3f7-40dd-b328-46864f67dfd6" xlink:to="loc_us-gaap_RelatedPartyDomain_e940a723-e3f7-40dd-b328-46864f67dfd6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_1fb09cf1-fa7b-4d25-92b8-362833cfaa6f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_e940a723-e3f7-40dd-b328-46864f67dfd6" xlink:to="loc_us-gaap_RelatedPartyDomain_1fb09cf1-fa7b-4d25-92b8-362833cfaa6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ViperEnergyPartnersLPMember_ae87fd37-889f-498e-a127-462c32ed4922" xlink:href="fang-20210930.xsd#fang_ViperEnergyPartnersLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_1fb09cf1-fa7b-4d25-92b8-362833cfaa6f" xlink:to="loc_fang_ViperEnergyPartnersLPMember_ae87fd37-889f-498e-a127-462c32ed4922" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DERIVATIVESOpenDerivativePositionsDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DERIVATIVESOpenDerivativePositionsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DERIVATIVESOpenDerivativePositionsDetails" xlink:type="extended" id="ie226318a03054e8bb985fbcf0f6beb17_DERIVATIVESOpenDerivativePositionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountVolume_c84372fa-7450-44b5-9e0f-f196a4bba095" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountVolume_c84372fa-7450-44b5-9e0f-f196a4bba095" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_5097d0d3-4320-445e-bb6f-b86e298d3fb4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_5097d0d3-4320-445e-bb6f-b86e298d3fb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeWeightedAverageDifferential_20e5f802-b17f-401e-99d1-f8723b12cf38" xlink:href="fang-20210930.xsd#fang_DerivativeWeightedAverageDifferential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:to="loc_fang_DerivativeWeightedAverageDifferential_20e5f802-b17f-401e-99d1-f8723b12cf38" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeSwapTypeFixedPrice_d954d6d2-32df-4f69-ace6-91dcd7fafb4a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeSwapTypeFixedPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:to="loc_us-gaap_DerivativeSwapTypeFixedPrice_d954d6d2-32df-4f69-ace6-91dcd7fafb4a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFloorPrice_fdfc80a5-01d8-45c6-8b65-b97dda9e0185" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeFloorPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:to="loc_us-gaap_DerivativeFloorPrice_fdfc80a5-01d8-45c6-8b65-b97dda9e0185" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCapPrice_df49adc7-4573-4531-8896-f1a96565970a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeCapPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:to="loc_us-gaap_DerivativeCapPrice_df49adc7-4573-4531-8896-f1a96565970a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativePriceRiskOptionStrikePrice_7d315c4f-9ee9-4a63-9e62-223c38715ad7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativePriceRiskOptionStrikePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:to="loc_us-gaap_DerivativePriceRiskOptionStrikePrice_7d315c4f-9ee9-4a63-9e62-223c38715ad7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeOptionPremium_6fe12a58-4379-4dea-81c3-bfc60335da67" xlink:href="fang-20210930.xsd#fang_DerivativeOptionPremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:to="loc_fang_DerivativeOptionPremium_6fe12a58-4379-4dea-81c3-bfc60335da67" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeDeferredOptionPremium_8afbedf9-8c2b-480d-ba77-49c8b58b453f" xlink:href="fang-20210930.xsd#fang_DerivativeDeferredOptionPremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:to="loc_fang_DerivativeDeferredOptionPremium_8afbedf9-8c2b-480d-ba77-49c8b58b453f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_4a109262-9d0a-4ede-828f-fcfefd731d51" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_9b50b421-1148-439d-bbf1-05d3a01ac080" xlink:to="loc_us-gaap_DerivativeTable_4a109262-9d0a-4ede-828f-fcfefd731d51" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyAxis_ad9065e9-e669-44ce-ac61-7b895229928a" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_EnergyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_4a109262-9d0a-4ede-828f-fcfefd731d51" xlink:to="loc_srt_EnergyAxis_ad9065e9-e669-44ce-ac61-7b895229928a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_ad9065e9-e669-44ce-ac61-7b895229928a_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_EnergyAxis_ad9065e9-e669-44ce-ac61-7b895229928a" xlink:to="loc_srt_EnergyDomain_ad9065e9-e669-44ce-ac61-7b895229928a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_4c9909a2-b25c-4267-b3b8-b4257f9ca011" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_EnergyAxis_ad9065e9-e669-44ce-ac61-7b895229928a" xlink:to="loc_srt_EnergyDomain_4c9909a2-b25c-4267-b3b8-b4257f9ca011" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CrudeOilMember_e5589908-61cc-4e94-829a-e5721d179fdc" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CrudeOilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_4c9909a2-b25c-4267-b3b8-b4257f9ca011" xlink:to="loc_srt_CrudeOilMember_e5589908-61cc-4e94-829a-e5721d179fdc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NaturalGasReservesMember_5373a8a3-f58b-4a8c-9bd2-b0e86016e5bf" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NaturalGasReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_4c9909a2-b25c-4267-b3b8-b4257f9ca011" xlink:to="loc_srt_NaturalGasReservesMember_5373a8a3-f58b-4a8c-9bd2-b0e86016e5bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NaturalGasLiquidsReservesMember_a108939f-4663-45d7-96cc-ecf79dbd90be" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NaturalGasLiquidsReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_4c9909a2-b25c-4267-b3b8-b4257f9ca011" xlink:to="loc_srt_NaturalGasLiquidsReservesMember_a108939f-4663-45d7-96cc-ecf79dbd90be" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearAxis_f1503de7-f810-45f2-b9a2-0fbfb4e2f528" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementYearAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_4a109262-9d0a-4ede-828f-fcfefd731d51" xlink:to="loc_fang_DerivativeSettlementYearAxis_f1503de7-f810-45f2-b9a2-0fbfb4e2f528" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearDomain_f1503de7-f810-45f2-b9a2-0fbfb4e2f528_default" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fang_DerivativeSettlementYearAxis_f1503de7-f810-45f2-b9a2-0fbfb4e2f528" xlink:to="loc_fang_DerivativeSettlementYearDomain_f1503de7-f810-45f2-b9a2-0fbfb4e2f528_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearDomain_8f1d7514-41f6-433f-8cba-45fb1f5b886b" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fang_DerivativeSettlementYearAxis_f1503de7-f810-45f2-b9a2-0fbfb4e2f528" xlink:to="loc_fang_DerivativeSettlementYearDomain_8f1d7514-41f6-433f-8cba-45fb1f5b886b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearOneMember_6601e57d-563c-4d09-90d2-a5d2fb145df4" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementYearOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementYearDomain_8f1d7514-41f6-433f-8cba-45fb1f5b886b" xlink:to="loc_fang_DerivativeSettlementYearOneMember_6601e57d-563c-4d09-90d2-a5d2fb145df4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearTwoMember_62c6aa3e-d829-43de-9125-d68e548bb1b8" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementYearTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementYearDomain_8f1d7514-41f6-433f-8cba-45fb1f5b886b" xlink:to="loc_fang_DerivativeSettlementYearTwoMember_62c6aa3e-d829-43de-9125-d68e548bb1b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementYearThreeMember_a119de2b-aa63-4e94-8089-81fe376c0fa3" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementYearThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementYearDomain_8f1d7514-41f6-433f-8cba-45fb1f5b886b" xlink:to="loc_fang_DerivativeSettlementYearThreeMember_a119de2b-aa63-4e94-8089-81fe376c0fa3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthAxis_8a32d983-3d6d-4fb1-bc1f-1cfae9f38c02" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_4a109262-9d0a-4ede-828f-fcfefd731d51" xlink:to="loc_fang_DerivativeSettlementMonthAxis_8a32d983-3d6d-4fb1-bc1f-1cfae9f38c02" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthDomain_8a32d983-3d6d-4fb1-bc1f-1cfae9f38c02_default" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fang_DerivativeSettlementMonthAxis_8a32d983-3d6d-4fb1-bc1f-1cfae9f38c02" xlink:to="loc_fang_DerivativeSettlementMonthDomain_8a32d983-3d6d-4fb1-bc1f-1cfae9f38c02_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthDomain_9e9fd212-ef6d-48a3-8081-c20cc8463e25" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fang_DerivativeSettlementMonthAxis_8a32d983-3d6d-4fb1-bc1f-1cfae9f38c02" xlink:to="loc_fang_DerivativeSettlementMonthDomain_9e9fd212-ef6d-48a3-8081-c20cc8463e25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthOneMember_43bcbc06-966c-40e2-a1c0-f5ae8b388e87" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_9e9fd212-ef6d-48a3-8081-c20cc8463e25" xlink:to="loc_fang_DerivativeSettlementMonthOneMember_43bcbc06-966c-40e2-a1c0-f5ae8b388e87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthTwoMember_693fb726-68f2-45b1-aa4b-d7c7126ffd15" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_9e9fd212-ef6d-48a3-8081-c20cc8463e25" xlink:to="loc_fang_DerivativeSettlementMonthTwoMember_693fb726-68f2-45b1-aa4b-d7c7126ffd15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthThreeMember_a07ca21d-aeb9-4c43-9d3b-2b0c14de0e23" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_9e9fd212-ef6d-48a3-8081-c20cc8463e25" xlink:to="loc_fang_DerivativeSettlementMonthThreeMember_a07ca21d-aeb9-4c43-9d3b-2b0c14de0e23" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthFourMember_fb2ea04f-644b-4593-af0a-28091d84d041" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_9e9fd212-ef6d-48a3-8081-c20cc8463e25" xlink:to="loc_fang_DerivativeSettlementMonthFourMember_fb2ea04f-644b-4593-af0a-28091d84d041" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthFiveMember_6272ca37-98ce-4604-85da-a4d38121fb27" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_9e9fd212-ef6d-48a3-8081-c20cc8463e25" xlink:to="loc_fang_DerivativeSettlementMonthFiveMember_6272ca37-98ce-4604-85da-a4d38121fb27" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthSixMember_470d04d2-8fb7-4ccb-993b-ee1a442e7123" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthSixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_9e9fd212-ef6d-48a3-8081-c20cc8463e25" xlink:to="loc_fang_DerivativeSettlementMonthSixMember_470d04d2-8fb7-4ccb-993b-ee1a442e7123" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthSevenMember_dbc1056c-e05b-4feb-9a0e-1d30bf07a666" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthSevenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_9e9fd212-ef6d-48a3-8081-c20cc8463e25" xlink:to="loc_fang_DerivativeSettlementMonthSevenMember_dbc1056c-e05b-4feb-9a0e-1d30bf07a666" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeSettlementMonthEightMember_f3c89bd3-aadb-4638-8f29-371e77e4a287" xlink:href="fang-20210930.xsd#fang_DerivativeSettlementMonthEightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeSettlementMonthDomain_9e9fd212-ef6d-48a3-8081-c20cc8463e25" xlink:to="loc_fang_DerivativeSettlementMonthEightMember_f3c89bd3-aadb-4638-8f29-371e77e4a287" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_7e0815ba-0411-4f9d-b69a-0ed3f8b226bc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_4a109262-9d0a-4ede-828f-fcfefd731d51" xlink:to="loc_us-gaap_FinancialInstrumentAxis_7e0815ba-0411-4f9d-b69a-0ed3f8b226bc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e0815ba-0411-4f9d-b69a-0ed3f8b226bc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_7e0815ba-0411-4f9d-b69a-0ed3f8b226bc" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e0815ba-0411-4f9d-b69a-0ed3f8b226bc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2f0ae263-888c-444b-ab21-c98a9a988fcd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_7e0815ba-0411-4f9d-b69a-0ed3f8b226bc" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2f0ae263-888c-444b-ab21-c98a9a988fcd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SwapMember_88cffaf3-c789-48ed-bb59-25669b7d7a40" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2f0ae263-888c-444b-ab21-c98a9a988fcd" xlink:to="loc_us-gaap_SwapMember_88cffaf3-c789-48ed-bb59-25669b7d7a40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BasisSwapMember_7e374fb1-aa6b-4f52-90cb-a9fac6805c12" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BasisSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2f0ae263-888c-444b-ab21-c98a9a988fcd" xlink:to="loc_us-gaap_BasisSwapMember_7e374fb1-aa6b-4f52-90cb-a9fac6805c12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RollingHedgeMember_1611e8be-c795-4603-9c42-3997347df952" xlink:href="fang-20210930.xsd#fang_RollingHedgeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2f0ae263-888c-444b-ab21-c98a9a988fcd" xlink:to="loc_fang_RollingHedgeMember_1611e8be-c795-4603-9c42-3997347df952" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_CostlessCollarMember_097ab466-3fce-4e9e-82eb-a55002dd01c1" xlink:href="fang-20210930.xsd#fang_CostlessCollarMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2f0ae263-888c-444b-ab21-c98a9a988fcd" xlink:to="loc_fang_CostlessCollarMember_097ab466-3fce-4e9e-82eb-a55002dd01c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SwaptionMember_fd835e03-c797-4bc4-9571-fcf60c48bae5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SwaptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2f0ae263-888c-444b-ab21-c98a9a988fcd" xlink:to="loc_us-gaap_SwaptionMember_fd835e03-c797-4bc4-9571-fcf60c48bae5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_a028f5cb-71c6-43f5-b855-a62b320986af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_4a109262-9d0a-4ede-828f-fcfefd731d51" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_a028f5cb-71c6-43f5-b855-a62b320986af" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_a028f5cb-71c6-43f5-b855-a62b320986af_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_a028f5cb-71c6-43f5-b855-a62b320986af" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_a028f5cb-71c6-43f5-b855-a62b320986af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_3c3f6d97-3028-4836-b808-0c8b4d6ad4b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_a028f5cb-71c6-43f5-b855-a62b320986af" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_3c3f6d97-3028-4836-b808-0c8b4d6ad4b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WTIMember_58ec791e-ad1f-41d0-b954-54c33e038f30" xlink:href="fang-20210930.xsd#fang_WTIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3c3f6d97-3028-4836-b808-0c8b4d6ad4b4" xlink:to="loc_fang_WTIMember_58ec791e-ad1f-41d0-b954-54c33e038f30" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WTIHoustonArgusMember_1a8bb02a-bff7-48b2-89e0-dbf0bf96930f" xlink:href="fang-20210930.xsd#fang_WTIHoustonArgusMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3c3f6d97-3028-4836-b808-0c8b4d6ad4b4" xlink:to="loc_fang_WTIHoustonArgusMember_1a8bb02a-bff7-48b2-89e0-dbf0bf96930f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_BrentMember_6ab40010-2f40-4465-aadd-95b09da7aea3" xlink:href="fang-20210930.xsd#fang_BrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3c3f6d97-3028-4836-b808-0c8b4d6ad4b4" xlink:to="loc_fang_BrentMember_6ab40010-2f40-4465-aadd-95b09da7aea3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ArgusWTIMidlandMember_460794ca-1e77-4fc1-8c05-2b50a5f25f1d" xlink:href="fang-20210930.xsd#fang_ArgusWTIMidlandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3c3f6d97-3028-4836-b808-0c8b4d6ad4b4" xlink:to="loc_fang_ArgusWTIMidlandMember_460794ca-1e77-4fc1-8c05-2b50a5f25f1d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_HenryHubMember_b1cf5434-6add-41a1-9e1d-29b027128492" xlink:href="fang-20210930.xsd#fang_HenryHubMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3c3f6d97-3028-4836-b808-0c8b4d6ad4b4" xlink:to="loc_fang_HenryHubMember_b1cf5434-6add-41a1-9e1d-29b027128492" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WahaHubMember_e4c60452-c602-4e1b-bc7a-bb37061395ec" xlink:href="fang-20210930.xsd#fang_WahaHubMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3c3f6d97-3028-4836-b808-0c8b4d6ad4b4" xlink:to="loc_fang_WahaHubMember_e4c60452-c602-4e1b-bc7a-bb37061395ec" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_MontBelvieuPropaneMember_0d929a6c-1998-467d-9c48-959fd35c5b29" xlink:href="fang-20210930.xsd#fang_MontBelvieuPropaneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3c3f6d97-3028-4836-b808-0c8b4d6ad4b4" xlink:to="loc_fang_MontBelvieuPropaneMember_0d929a6c-1998-467d-9c48-959fd35c5b29" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ArgusWTIMember_7de90ecf-ee28-4590-8a82-c80363f0d72f" xlink:href="fang-20210930.xsd#fang_ArgusWTIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3c3f6d97-3028-4836-b808-0c8b4d6ad4b4" xlink:to="loc_fang_ArgusWTIMember_7de90ecf-ee28-4590-8a82-c80363f0d72f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionAxis_b742b81b-b8bb-4b67-ab02-97ca44ab73e7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PositionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_4a109262-9d0a-4ede-828f-fcfefd731d51" xlink:to="loc_us-gaap_PositionAxis_b742b81b-b8bb-4b67-ab02-97ca44ab73e7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_b742b81b-b8bb-4b67-ab02-97ca44ab73e7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PositionAxis_b742b81b-b8bb-4b67-ab02-97ca44ab73e7" xlink:to="loc_us-gaap_PositionDomain_b742b81b-b8bb-4b67-ab02-97ca44ab73e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_feb5c4db-0f69-4205-84e5-9afab8f987d4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PositionAxis_b742b81b-b8bb-4b67-ab02-97ca44ab73e7" xlink:to="loc_us-gaap_PositionDomain_feb5c4db-0f69-4205-84e5-9afab8f987d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortMember_6d2e0e55-cbf6-4c3c-9292-0c0f4f9dff1d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_feb5c4db-0f69-4205-84e5-9afab8f987d4" xlink:to="loc_us-gaap_ShortMember_6d2e0e55-cbf6-4c3c-9292-0c0f4f9dff1d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DERIVATIVESInterestRateSwapsDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DERIVATIVESInterestRateSwapsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DERIVATIVESInterestRateSwapsDetails" xlink:type="extended" id="ibbcf268dd274461a846df0216efa73b9_DERIVATIVESInterestRateSwapsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_c0661d59-889b-4f7f-b496-736617c5fe3c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_db86cc3c-bfa4-4fa6-a7d5-2ea13193dcac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeNumberOfInstrumentsHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_c0661d59-889b-4f7f-b496-736617c5fe3c" xlink:to="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_db86cc3c-bfa4-4fa6-a7d5-2ea13193dcac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_80905759-3954-4d33-99f8-ff43a823a20e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_c0661d59-889b-4f7f-b496-736617c5fe3c" xlink:to="loc_us-gaap_DerivativeNotionalAmount_80905759-3954-4d33-99f8-ff43a823a20e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueHedgesAtFairValueNet_6ab5eb3d-bf39-4bb2-ad69-8f19a2aad87c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueHedgesAtFairValueNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_c0661d59-889b-4f7f-b496-736617c5fe3c" xlink:to="loc_us-gaap_FairValueHedgesAtFairValueNet_6ab5eb3d-bf39-4bb2-ad69-8f19a2aad87c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFixedInterestRate_117a971f-ed15-4aa9-b0b1-5d2607560f72" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeFixedInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_c0661d59-889b-4f7f-b496-736617c5fe3c" xlink:to="loc_us-gaap_DerivativeFixedInterestRate_117a971f-ed15-4aa9-b0b1-5d2607560f72" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAverageVariableInterestRate_11ca2b36-ab2b-49b6-be73-70904e8a7377" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeAverageVariableInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_c0661d59-889b-4f7f-b496-736617c5fe3c" xlink:to="loc_us-gaap_DerivativeAverageVariableInterestRate_11ca2b36-ab2b-49b6-be73-70904e8a7377" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfDerivatives_65c20818-2c19-477a-b234-e1539aa286e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnSaleOfDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_c0661d59-889b-4f7f-b496-736617c5fe3c" xlink:to="loc_us-gaap_GainLossOnSaleOfDerivatives_65c20818-2c19-477a-b234-e1539aa286e4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_30cf7720-3286-435e-8d92-9638e4b07775" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_c0661d59-889b-4f7f-b496-736617c5fe3c" xlink:to="loc_us-gaap_DerivativeTable_30cf7720-3286-435e-8d92-9638e4b07775" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_ab1e33e7-a313-47d0-aae0-da1bc3e73064" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_30cf7720-3286-435e-8d92-9638e4b07775" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_ab1e33e7-a313-47d0-aae0-da1bc3e73064" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_ab1e33e7-a313-47d0-aae0-da1bc3e73064_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_ab1e33e7-a313-47d0-aae0-da1bc3e73064" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_ab1e33e7-a313-47d0-aae0-da1bc3e73064_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_18273e4e-a4b6-4a30-9a87-0033ef2d37c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_ab1e33e7-a313-47d0-aae0-da1bc3e73064" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_18273e4e-a4b6-4a30-9a87-0033ef2d37c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_e9ce2f36-77ce-40dc-86d2-38b59b36ecc0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_18273e4e-a4b6-4a30-9a87-0033ef2d37c8" xlink:to="loc_us-gaap_InterestRateContractMember_e9ce2f36-77ce-40dc-86d2-38b59b36ecc0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_e33928a9-ef7d-4b32-9a04-0870bdce06dc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_18273e4e-a4b6-4a30-9a87-0033ef2d37c8" xlink:to="loc_us-gaap_InterestRateSwapMember_e33928a9-ef7d-4b32-9a04-0870bdce06dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_4eeeae2c-e476-4547-be60-c821448070dc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_30cf7720-3286-435e-8d92-9638e4b07775" xlink:to="loc_us-gaap_DebtInstrumentAxis_4eeeae2c-e476-4547-be60-c821448070dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_4eeeae2c-e476-4547-be60-c821448070dc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_4eeeae2c-e476-4547-be60-c821448070dc" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_4eeeae2c-e476-4547-be60-c821448070dc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5f56811c-ac89-4d75-b0b8-97b662b069d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_4eeeae2c-e476-4547-be60-c821448070dc" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5f56811c-ac89-4d75-b0b8-97b662b069d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SeniorNotesDue2029Member_de209936-3202-46cc-baa7-213540c4b42b" xlink:href="fang-20210930.xsd#fang_SeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5f56811c-ac89-4d75-b0b8-97b662b069d2" xlink:to="loc_fang_SeniorNotesDue2029Member_de209936-3202-46cc-baa7-213540c4b42b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_3fa40611-213e-4760-aacb-8b1815dcf07f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_30cf7720-3286-435e-8d92-9638e4b07775" xlink:to="loc_us-gaap_HedgingDesignationAxis_3fa40611-213e-4760-aacb-8b1815dcf07f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_3fa40611-213e-4760-aacb-8b1815dcf07f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_3fa40611-213e-4760-aacb-8b1815dcf07f" xlink:to="loc_us-gaap_HedgingDesignationDomain_3fa40611-213e-4760-aacb-8b1815dcf07f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_d63e02a4-bed7-4cf3-b0c1-b6e4be9c104e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_3fa40611-213e-4760-aacb-8b1815dcf07f" xlink:to="loc_us-gaap_HedgingDesignationDomain_d63e02a4-bed7-4cf3-b0c1-b6e4be9c104e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_9f641004-1e2d-4bc5-a419-b0024a9a9dbc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_d63e02a4-bed7-4cf3-b0c1-b6e4be9c104e" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_9f641004-1e2d-4bc5-a419-b0024a9a9dbc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_4100baef-92d0-4b0e-b24d-9c92d10e287a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_30cf7720-3286-435e-8d92-9638e4b07775" xlink:to="loc_us-gaap_VariableRateAxis_4100baef-92d0-4b0e-b24d-9c92d10e287a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_4100baef-92d0-4b0e-b24d-9c92d10e287a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_4100baef-92d0-4b0e-b24d-9c92d10e287a" xlink:to="loc_us-gaap_VariableRateDomain_4100baef-92d0-4b0e-b24d-9c92d10e287a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_67cd5a08-a667-4ccb-a7bd-1c8637e35e22" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_4100baef-92d0-4b0e-b24d-9c92d10e287a" xlink:to="loc_us-gaap_VariableRateDomain_67cd5a08-a667-4ccb-a7bd-1c8637e35e22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_fb70fedf-e797-4dcb-8f85-6b4103db2d36" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_67cd5a08-a667-4ccb-a7bd-1c8637e35e22" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_fb70fedf-e797-4dcb-8f85-6b4103db2d36" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/DERIVATIVESDerivativesNotDesignatedasHedgingInstrumentsDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#DERIVATIVESDerivativesNotDesignatedasHedgingInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/DERIVATIVESDerivativesNotDesignatedasHedgingInstrumentsDetails" xlink:type="extended" id="i34bf77f9378d498d8ce5cca40ee87c42_DERIVATIVESDerivativesNotDesignatedasHedgingInstrumentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_5c598bea-4747-4cee-b38e-dbd0b035e1bf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_564efd09-737d-46df-9be0-8eb1515a4666" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_5c598bea-4747-4cee-b38e-dbd0b035e1bf" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_564efd09-737d-46df-9be0-8eb1515a4666" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfDerivatives_dd719c9e-f87a-4d64-9a30-59e84f39b4e2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnSaleOfDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_5c598bea-4747-4cee-b38e-dbd0b035e1bf" xlink:to="loc_us-gaap_GainLossOnSaleOfDerivatives_dd719c9e-f87a-4d64-9a30-59e84f39b4e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeCashPaidOnHedge_a2bd35ad-43f6-4a7f-a820-3115a48da3d6" xlink:href="fang-20210930.xsd#fang_DerivativeCashPaidOnHedge"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_5c598bea-4747-4cee-b38e-dbd0b035e1bf" xlink:to="loc_fang_DerivativeCashPaidOnHedge_a2bd35ad-43f6-4a7f-a820-3115a48da3d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCashReceivedOnHedge_47e28305-a31d-4732-9a25-2a59a3395fd3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeCashReceivedOnHedge"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_5c598bea-4747-4cee-b38e-dbd0b035e1bf" xlink:to="loc_us-gaap_DerivativeCashReceivedOnHedge_47e28305-a31d-4732-9a25-2a59a3395fd3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_721b70bc-61e1-402a-9ef2-27d6d4814406" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_5c598bea-4747-4cee-b38e-dbd0b035e1bf" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_721b70bc-61e1-402a-9ef2-27d6d4814406" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_588d29e9-aaa1-4abf-82fd-f23360cc852c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_721b70bc-61e1-402a-9ef2-27d6d4814406" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_588d29e9-aaa1-4abf-82fd-f23360cc852c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_588d29e9-aaa1-4abf-82fd-f23360cc852c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_588d29e9-aaa1-4abf-82fd-f23360cc852c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_588d29e9-aaa1-4abf-82fd-f23360cc852c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_cfb3d4b7-bdf9-4cd9-9664-8479108c8483" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_588d29e9-aaa1-4abf-82fd-f23360cc852c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_cfb3d4b7-bdf9-4cd9-9664-8479108c8483" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_9e77b1f6-37e4-46a4-bae6-531bc028dab4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_cfb3d4b7-bdf9-4cd9-9664-8479108c8483" xlink:to="loc_us-gaap_CommodityContractMember_9e77b1f6-37e4-46a4-bae6-531bc028dab4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_135e99bf-be8f-4dc2-9c4f-91195dbbf87d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_cfb3d4b7-bdf9-4cd9-9664-8479108c8483" xlink:to="loc_us-gaap_InterestRateContractMember_135e99bf-be8f-4dc2-9c4f-91195dbbf87d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTSRecurringMeasurementsDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#FAIRVALUEMEASUREMENTSRecurringMeasurementsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTSRecurringMeasurementsDetails" xlink:type="extended" id="icbdb93b74bea49788ba5808ce71d0104_FAIRVALUEMEASUREMENTSRecurringMeasurementsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_78e49e3e-30e1-450e-b6e8-051a49f66514" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsAbstract_f63cbce4-58c9-48d6-ac6a-7f5d78a33845" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_78e49e3e-30e1-450e-b6e8-051a49f66514" xlink:to="loc_us-gaap_DerivativeAssetsAbstract_f63cbce4-58c9-48d6-ac6a-7f5d78a33845" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetCurrentAbstract_a72eb02c-1c7b-4a3c-bd74-5fd1b04c46cd" xlink:href="fang-20210930.xsd#fang_DerivativeAssetCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_f63cbce4-58c9-48d6-ac6a-7f5d78a33845" xlink:to="loc_fang_DerivativeAssetCurrentAbstract_a72eb02c-1c7b-4a3c-bd74-5fd1b04c46cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetFairValueGrossAssetCurrent_aa818acd-0bca-4501-a5b4-f2420ba0b80a" xlink:href="fang-20210930.xsd#fang_DerivativeAssetFairValueGrossAssetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetCurrentAbstract_a72eb02c-1c7b-4a3c-bd74-5fd1b04c46cd" xlink:to="loc_fang_DerivativeAssetFairValueGrossAssetCurrent_aa818acd-0bca-4501-a5b4-f2420ba0b80a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetFairValueGrossLiabilityCurrent_5d9e7169-3c25-426a-91fb-52bca143976e" xlink:href="fang-20210930.xsd#fang_DerivativeAssetFairValueGrossLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetCurrentAbstract_a72eb02c-1c7b-4a3c-bd74-5fd1b04c46cd" xlink:to="loc_fang_DerivativeAssetFairValueGrossLiabilityCurrent_5d9e7169-3c25-426a-91fb-52bca143976e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsCurrent_1a6c3326-7b79-4deb-a6a9-4efba16d7995" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetCurrentAbstract_a72eb02c-1c7b-4a3c-bd74-5fd1b04c46cd" xlink:to="loc_us-gaap_DerivativeAssetsCurrent_1a6c3326-7b79-4deb-a6a9-4efba16d7995" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetNonCurrentAbstract_221cb287-7c5d-4cc2-a767-79cf78e2ce1e" xlink:href="fang-20210930.xsd#fang_DerivativeAssetNonCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_f63cbce4-58c9-48d6-ac6a-7f5d78a33845" xlink:to="loc_fang_DerivativeAssetNonCurrentAbstract_221cb287-7c5d-4cc2-a767-79cf78e2ce1e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetFairValueGrossAssetNonCurrent_1997eba3-5176-49f4-84df-f4ba00ff66e7" xlink:href="fang-20210930.xsd#fang_DerivativeAssetFairValueGrossAssetNonCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetNonCurrentAbstract_221cb287-7c5d-4cc2-a767-79cf78e2ce1e" xlink:to="loc_fang_DerivativeAssetFairValueGrossAssetNonCurrent_1997eba3-5176-49f4-84df-f4ba00ff66e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeAssetFairValueGrossLiabilityNonCurrent_f60bf45a-4eee-4cc3-a508-a3687bb69ea4" xlink:href="fang-20210930.xsd#fang_DerivativeAssetFairValueGrossLiabilityNonCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetNonCurrentAbstract_221cb287-7c5d-4cc2-a767-79cf78e2ce1e" xlink:to="loc_fang_DerivativeAssetFairValueGrossLiabilityNonCurrent_f60bf45a-4eee-4cc3-a508-a3687bb69ea4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_4035642e-14f8-4c08-9dca-c0d5e48477d1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeAssetNonCurrentAbstract_221cb287-7c5d-4cc2-a767-79cf78e2ce1e" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_4035642e-14f8-4c08-9dca-c0d5e48477d1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesAbstract_0ff892ea-23ca-421e-b7b8-5a53663b285e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_78e49e3e-30e1-450e-b6e8-051a49f66514" xlink:to="loc_us-gaap_DerivativeLiabilitiesAbstract_0ff892ea-23ca-421e-b7b8-5a53663b285e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityCurrentAbstract_db839357-cdd2-474a-b063-16574097c8ee" xlink:href="fang-20210930.xsd#fang_DerivativeLiabilityCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_0ff892ea-23ca-421e-b7b8-5a53663b285e" xlink:to="loc_fang_DerivativeLiabilityCurrentAbstract_db839357-cdd2-474a-b063-16574097c8ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityFairValueGrossLiabilityCurrent_1b138d6c-72a1-443d-a11d-f9fd4ab67da3" xlink:href="fang-20210930.xsd#fang_DerivativeLiabilityFairValueGrossLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityCurrentAbstract_db839357-cdd2-474a-b063-16574097c8ee" xlink:to="loc_fang_DerivativeLiabilityFairValueGrossLiabilityCurrent_1b138d6c-72a1-443d-a11d-f9fd4ab67da3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityFairValueGrossAssetCurrent_4839cdee-0940-44af-882f-688e162239b4" xlink:href="fang-20210930.xsd#fang_DerivativeLiabilityFairValueGrossAssetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityCurrentAbstract_db839357-cdd2-474a-b063-16574097c8ee" xlink:to="loc_fang_DerivativeLiabilityFairValueGrossAssetCurrent_4839cdee-0940-44af-882f-688e162239b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_fead529b-d062-46f8-aa38-a5010b0f337b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityCurrentAbstract_db839357-cdd2-474a-b063-16574097c8ee" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_fead529b-d062-46f8-aa38-a5010b0f337b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityNonCurrentAbstract_94bb17e0-3ce7-4f4c-b8aa-f05c0b29c343" xlink:href="fang-20210930.xsd#fang_DerivativeLiabilityNonCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_0ff892ea-23ca-421e-b7b8-5a53663b285e" xlink:to="loc_fang_DerivativeLiabilityNonCurrentAbstract_94bb17e0-3ce7-4f4c-b8aa-f05c0b29c343" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityFairValueGrossLiabilityNoncurrent_cc11cb68-6e62-4242-a67c-7c4c6fce0e29" xlink:href="fang-20210930.xsd#fang_DerivativeLiabilityFairValueGrossLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityNonCurrentAbstract_94bb17e0-3ce7-4f4c-b8aa-f05c0b29c343" xlink:to="loc_fang_DerivativeLiabilityFairValueGrossLiabilityNoncurrent_cc11cb68-6e62-4242-a67c-7c4c6fce0e29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DerivativeLiabilityFairValueGrossAssetNoncurrent_cac26531-7074-476e-84a6-6c257019f4e4" xlink:href="fang-20210930.xsd#fang_DerivativeLiabilityFairValueGrossAssetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityNonCurrentAbstract_94bb17e0-3ce7-4f4c-b8aa-f05c0b29c343" xlink:to="loc_fang_DerivativeLiabilityFairValueGrossAssetNoncurrent_cac26531-7074-476e-84a6-6c257019f4e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_a8d4f7e1-5e28-4ab2-8b6a-d843aec6a426" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fang_DerivativeLiabilityNonCurrentAbstract_94bb17e0-3ce7-4f4c-b8aa-f05c0b29c343" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_a8d4f7e1-5e28-4ab2-8b6a-d843aec6a426" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0337b883-a35b-4374-88c4-1f6c0cb34926" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_78e49e3e-30e1-450e-b6e8-051a49f66514" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0337b883-a35b-4374-88c4-1f6c0cb34926" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_63b567f7-7b64-4d57-a721-09edb0a39202" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0337b883-a35b-4374-88c4-1f6c0cb34926" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_63b567f7-7b64-4d57-a721-09edb0a39202" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_63b567f7-7b64-4d57-a721-09edb0a39202_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_63b567f7-7b64-4d57-a721-09edb0a39202" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_63b567f7-7b64-4d57-a721-09edb0a39202_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_d24a3350-c3b8-47db-992b-733b9a64a7a2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_63b567f7-7b64-4d57-a721-09edb0a39202" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_d24a3350-c3b8-47db-992b-733b9a64a7a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_467624d6-1370-4d50-a760-944074d756e3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_d24a3350-c3b8-47db-992b-733b9a64a7a2" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_467624d6-1370-4d50-a760-944074d756e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4fc98940-e39a-42ae-b871-c849211ce6b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0337b883-a35b-4374-88c4-1f6c0cb34926" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4fc98940-e39a-42ae-b871-c849211ce6b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4fc98940-e39a-42ae-b871-c849211ce6b4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4fc98940-e39a-42ae-b871-c849211ce6b4" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4fc98940-e39a-42ae-b871-c849211ce6b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_200b1a5c-bcaa-4628-a626-81674e758ea4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4fc98940-e39a-42ae-b871-c849211ce6b4" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_200b1a5c-bcaa-4628-a626-81674e758ea4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_852bb902-3013-42f3-8666-e29ab0346414" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_200b1a5c-bcaa-4628-a626-81674e758ea4" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_852bb902-3013-42f3-8666-e29ab0346414" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_71b6afe7-6283-4e9b-a91f-79209d69eb67" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_200b1a5c-bcaa-4628-a626-81674e758ea4" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_71b6afe7-6283-4e9b-a91f-79209d69eb67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_292204c1-fcd5-48f4-8c51-acf791af5eeb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_200b1a5c-bcaa-4628-a626-81674e758ea4" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_292204c1-fcd5-48f4-8c51-acf791af5eeb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_739dca70-7914-42c1-9232-96731edf32b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0337b883-a35b-4374-88c4-1f6c0cb34926" xlink:to="loc_us-gaap_FinancialInstrumentAxis_739dca70-7914-42c1-9232-96731edf32b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_739dca70-7914-42c1-9232-96731edf32b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_739dca70-7914-42c1-9232-96731edf32b0" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_739dca70-7914-42c1-9232-96731edf32b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e7d1b614-dded-483d-87b6-be68c53fa689" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_739dca70-7914-42c1-9232-96731edf32b0" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e7d1b614-dded-483d-87b6-be68c53fa689" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeMember_27cf7ec6-a4f4-43f4-a0ca-0ebee1a4a250" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e7d1b614-dded-483d-87b6-be68c53fa689" xlink:to="loc_us-gaap_DerivativeMember_27cf7ec6-a4f4-43f4-a0ca-0ebee1a4a250" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_3ef812ad-0937-4d8a-a104-ecba1e56a6ef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e7d1b614-dded-483d-87b6-be68c53fa689" xlink:to="loc_us-gaap_InterestRateSwapMember_3ef812ad-0937-4d8a-a104-ecba1e56a6ef" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTSAssetandLiabilitiesNotRecordedatFairValueDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#FAIRVALUEMEASUREMENTSAssetandLiabilitiesNotRecordedatFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/FAIRVALUEMEASUREMENTSAssetandLiabilitiesNotRecordedatFairValueDetails" xlink:type="extended" id="ie03204cb8671490caafc66b871bd0a9a_FAIRVALUEMEASUREMENTSAssetandLiabilitiesNotRecordedatFairValueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3bb39230-3eff-47af-8904-97bec1d727f5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_d80fa9f7-ce98-4656-a4ad-5783e2d307fa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3bb39230-3eff-47af-8904-97bec1d727f5" xlink:to="loc_us-gaap_LongTermDebtFairValue_d80fa9f7-ce98-4656-a4ad-5783e2d307fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c5a68499-5ca7-401a-981a-7820323e8b84" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3bb39230-3eff-47af-8904-97bec1d727f5" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c5a68499-5ca7-401a-981a-7820323e8b84" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_04e03f42-2b01-40b1-9f9f-1f906b2b6db4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c5a68499-5ca7-401a-981a-7820323e8b84" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_04e03f42-2b01-40b1-9f9f-1f906b2b6db4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_04e03f42-2b01-40b1-9f9f-1f906b2b6db4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_04e03f42-2b01-40b1-9f9f-1f906b2b6db4" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_04e03f42-2b01-40b1-9f9f-1f906b2b6db4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_cf5ec287-5896-44b3-b7bd-443e28f003cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_04e03f42-2b01-40b1-9f9f-1f906b2b6db4" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_cf5ec287-5896-44b3-b7bd-443e28f003cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_334e42c3-0d4d-4c63-b3bb-71fadd688406" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_cf5ec287-5896-44b3-b7bd-443e28f003cf" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_334e42c3-0d4d-4c63-b3bb-71fadd688406" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_bc956729-6907-4a7f-911d-7c11e36bfc68" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_334e42c3-0d4d-4c63-b3bb-71fadd688406" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_bc956729-6907-4a7f-911d-7c11e36bfc68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_c78e4df6-1144-46a6-ab09-203cfe57b59b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_334e42c3-0d4d-4c63-b3bb-71fadd688406" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_c78e4df6-1144-46a6-ab09-203cfe57b59b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_78c1dc32-49b8-48c3-b649-84549fe4f02d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c5a68499-5ca7-401a-981a-7820323e8b84" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_78c1dc32-49b8-48c3-b649-84549fe4f02d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_78c1dc32-49b8-48c3-b649-84549fe4f02d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_78c1dc32-49b8-48c3-b649-84549fe4f02d" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_78c1dc32-49b8-48c3-b649-84549fe4f02d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_6993de27-7c38-42b2-86ed-9abec3ac03a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_78c1dc32-49b8-48c3-b649-84549fe4f02d" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_6993de27-7c38-42b2-86ed-9abec3ac03a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_93d1d5a8-1eab-4696-bd99-d6fbeb5b8d71" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsNonrecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_6993de27-7c38-42b2-86ed-9abec3ac03a1" xlink:to="loc_us-gaap_FairValueMeasurementsNonrecurringMember_93d1d5a8-1eab-4696-bd99-d6fbeb5b8d71" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SUBSEQUENTEVENTSNarrativesDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#SUBSEQUENTEVENTSNarrativesDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SUBSEQUENTEVENTSNarrativesDetails" xlink:type="extended" id="i6d9517b8577341a6a0c281df47e532c3_SUBSEQUENTEVENTSNarrativesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_159cae8e-31e2-449c-a40b-527ed3c1df49" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_159cae8e-31e2-449c-a40b-527ed3c1df49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionPriceOfAcquisitionExpected_0db7ed18-61dc-47e6-b2d0-f05f3398ead6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetAcquisitionPriceOfAcquisitionExpected"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_AssetAcquisitionPriceOfAcquisitionExpected_0db7ed18-61dc-47e6-b2d0-f05f3398ead6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionPropertyAcquired_5798c3ae-5945-415b-a702-237c274e2c34" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionPropertyAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_AssetAcquisitionPropertyAcquired_5798c3ae-5945-415b-a702-237c274e2c34" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AreaOfLand_eb6d55fc-09f1-4142-bd5c-f799f1b2feb4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AreaOfLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_AreaOfLand_eb6d55fc-09f1-4142-bd5c-f799f1b2feb4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_13d4255b-12c8-4a79-a9f5-3bc37e740d9c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_13d4255b-12c8-4a79-a9f5-3bc37e740d9c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_6ece3e79-fdbf-4ba9-90d2-fce8f1325b9b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_6ece3e79-fdbf-4ba9-90d2-fce8f1325b9b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment_cf86fd8c-416d-4c73-95e4-c3e21156e1ae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment_cf86fd8c-416d-4c73-95e4-c3e21156e1ae" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DebtInstrumentRedemptionAmount_f1931302-f7cc-4e37-85c5-83ddf5a66e47" xlink:href="fang-20210930.xsd#fang_DebtInstrumentRedemptionAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_DebtInstrumentRedemptionAmount_f1931302-f7cc-4e37-85c5-83ddf5a66e47" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_94d7d191-a4dc-4196-ad60-0dfceb710cfb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_94d7d191-a4dc-4196-ad60-0dfceb710cfb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_f5116528-5a05-4099-9fb9-06c3936a81aa" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares_f5116528-5a05-4099-9fb9-06c3936a81aa" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_PaymentsForAssetAcquisitions_8d252759-adbc-4114-b17d-9a01b55006e6" xlink:href="fang-20210930.xsd#fang_PaymentsForAssetAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_PaymentsForAssetAcquisitions_8d252759-adbc-4114-b17d-9a01b55006e6" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_AssetAcquisitionPercentageOfSharesAcquired_a4c7e084-9fb4-43db-a691-972d784a6661" xlink:href="fang-20210930.xsd#fang_AssetAcquisitionPercentageOfSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_AssetAcquisitionPercentageOfSharesAcquired_a4c7e084-9fb4-43db-a691-972d784a6661" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionConsiderationTransferredContingentConsideration_42c07101-8d7d-49c3-a78f-54b198f4f743" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetAcquisitionConsiderationTransferredContingentConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_AssetAcquisitionConsiderationTransferredContingentConsideration_42c07101-8d7d-49c3-a78f-54b198f4f743" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_4dbc19f4-7919-48d7-b38d-0c9f3dd29c81" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_4dbc19f4-7919-48d7-b38d-0c9f3dd29c81" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_6c39bb1a-3ad6-46ac-bc28-a8adb331a93b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_6c39bb1a-3ad6-46ac-bc28-a8adb331a93b" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_JointVentureInterestAcquired_d2416f3c-a33d-4175-bec6-2edae37eea78" xlink:href="fang-20210930.xsd#fang_JointVentureInterestAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_JointVentureInterestAcquired_d2416f3c-a33d-4175-bec6-2edae37eea78" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GasProcessingPlantsNumberOfPlants_6a9490bf-aeca-45dd-81d4-6f305f87a0d0" xlink:href="fang-20210930.xsd#fang_GasProcessingPlantsNumberOfPlants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_GasProcessingPlantsNumberOfPlants_6a9490bf-aeca-45dd-81d4-6f305f87a0d0" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_GasGatheringAndProcessingSystemCapacity_a06daf3b-045d-4fc8-86cc-08ce43b5dab2" xlink:href="fang-20210930.xsd#fang_GasGatheringAndProcessingSystemCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_GasGatheringAndProcessingSystemCapacity_a06daf3b-045d-4fc8-86cc-08ce43b5dab2" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SaleOfOilAndGasPropertyAndEquipmentGrossPotentialConsideration_bd1844a3-9fd3-45bc-95ab-7638951f7e69" xlink:href="fang-20210930.xsd#fang_SaleOfOilAndGasPropertyAndEquipmentGrossPotentialConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_SaleOfOilAndGasPropertyAndEquipmentGrossPotentialConsideration_bd1844a3-9fd3-45bc-95ab-7638951f7e69" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SaleOfOilAndGasPropertyAndEquipmentGrossPotentialConsiderationDueAtClosing_0e9d8fe5-0e7d-4fc6-9d9b-22f446952f95" xlink:href="fang-20210930.xsd#fang_SaleOfOilAndGasPropertyAndEquipmentGrossPotentialConsiderationDueAtClosing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_SaleOfOilAndGasPropertyAndEquipmentGrossPotentialConsiderationDueAtClosing_0e9d8fe5-0e7d-4fc6-9d9b-22f446952f95" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_SaleOfOilAndGasPropertyAndEquipmentContingentConsideration_11db8b7d-3934-4053-8d01-55cd0b090579" xlink:href="fang-20210930.xsd#fang_SaleOfOilAndGasPropertyAndEquipmentContingentConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_fang_SaleOfOilAndGasPropertyAndEquipmentContingentConsideration_11db8b7d-3934-4053-8d01-55cd0b090579" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_8409880b-b585-4ccd-841e-39eca723ea8f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_5ce788ce-cda3-469d-8718-1212d7334e73" xlink:to="loc_us-gaap_SubsequentEventTable_8409880b-b585-4ccd-841e-39eca723ea8f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_80eec19c-65fc-4baa-8f19-46e22080cfe8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_8409880b-b585-4ccd-841e-39eca723ea8f" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_80eec19c-65fc-4baa-8f19-46e22080cfe8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_80eec19c-65fc-4baa-8f19-46e22080cfe8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_80eec19c-65fc-4baa-8f19-46e22080cfe8" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_80eec19c-65fc-4baa-8f19-46e22080cfe8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_edc60fb3-a637-414a-8130-bcf34ad9cc29" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_80eec19c-65fc-4baa-8f19-46e22080cfe8" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_edc60fb3-a637-414a-8130-bcf34ad9cc29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_fa604cba-894c-4c0e-b4f7-af6464a81743" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_edc60fb3-a637-414a-8130-bcf34ad9cc29" xlink:to="loc_us-gaap_SubsequentEventMember_fa604cba-894c-4c0e-b4f7-af6464a81743" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionAxis_3d6c27a9-aabb-4ab6-8ebb-f5fb913a02c2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_8409880b-b585-4ccd-841e-39eca723ea8f" xlink:to="loc_us-gaap_AssetAcquisitionAxis_3d6c27a9-aabb-4ab6-8ebb-f5fb913a02c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_3d6c27a9-aabb-4ab6-8ebb-f5fb913a02c2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AssetAcquisitionAxis_3d6c27a9-aabb-4ab6-8ebb-f5fb913a02c2" xlink:to="loc_us-gaap_AssetAcquisitionDomain_3d6c27a9-aabb-4ab6-8ebb-f5fb913a02c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_90b0cd8b-ac9e-4362-8ea9-2cf8f1a42798" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AssetAcquisitionAxis_3d6c27a9-aabb-4ab6-8ebb-f5fb913a02c2" xlink:to="loc_us-gaap_AssetAcquisitionDomain_90b0cd8b-ac9e-4362-8ea9-2cf8f1a42798" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DropdownTransactionMember_79bb99bf-b12d-4274-9fe8-293b2616fa24" xlink:href="fang-20210930.xsd#fang_DropdownTransactionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionDomain_90b0cd8b-ac9e-4362-8ea9-2cf8f1a42798" xlink:to="loc_fang_DropdownTransactionMember_79bb99bf-b12d-4274-9fe8-293b2616fa24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_VipersSwallowtailAcquisitionMember_691fbed3-cf7c-4e0e-bce4-bcd456df0095" xlink:href="fang-20210930.xsd#fang_VipersSwallowtailAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionDomain_90b0cd8b-ac9e-4362-8ea9-2cf8f1a42798" xlink:to="loc_fang_VipersSwallowtailAcquisitionMember_691fbed3-cf7c-4e0e-bce4-bcd456df0095" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_d3320693-4f8e-465e-a0b3-617c4e9e2a11" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_8409880b-b585-4ccd-841e-39eca723ea8f" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_d3320693-4f8e-465e-a0b3-617c4e9e2a11" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_d3320693-4f8e-465e-a0b3-617c4e9e2a11_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_d3320693-4f8e-465e-a0b3-617c4e9e2a11" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_d3320693-4f8e-465e-a0b3-617c4e9e2a11_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3796068e-d4ce-4a97-ac2b-ba29a43cb664" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_d3320693-4f8e-465e-a0b3-617c4e9e2a11" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3796068e-d4ce-4a97-ac2b-ba29a43cb664" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WillistonBasinMember_c1ea2462-0647-499b-bef1-0333164a38ff" xlink:href="fang-20210930.xsd#fang_WillistonBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3796068e-d4ce-4a97-ac2b-ba29a43cb664" xlink:to="loc_fang_WillistonBasinMember_c1ea2462-0647-499b-bef1-0333164a38ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RattlersGasGatheringMember_b0f2cb06-cefc-4388-b879-e0fee6c7d2ac" xlink:href="fang-20210930.xsd#fang_RattlersGasGatheringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_3796068e-d4ce-4a97-ac2b-ba29a43cb664" xlink:to="loc_fang_RattlersGasGatheringMember_b0f2cb06-cefc-4388-b879-e0fee6c7d2ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_5b1e6ff6-5fe6-4062-a6d0-db6f505323b5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_8409880b-b585-4ccd-841e-39eca723ea8f" xlink:to="loc_us-gaap_DebtInstrumentAxis_5b1e6ff6-5fe6-4062-a6d0-db6f505323b5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5b1e6ff6-5fe6-4062-a6d0-db6f505323b5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_5b1e6ff6-5fe6-4062-a6d0-db6f505323b5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5b1e6ff6-5fe6-4062-a6d0-db6f505323b5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5f6e9572-e53e-4432-ad7b-516117c32d89" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_5b1e6ff6-5fe6-4062-a6d0-db6f505323b5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5f6e9572-e53e-4432-ad7b-516117c32d89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_A2023NotesMember_1d799b32-cda3-447c-8d59-990fed536950" xlink:href="fang-20210930.xsd#fang_A2023NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5f6e9572-e53e-4432-ad7b-516117c32d89" xlink:to="loc_fang_A2023NotesMember_1d799b32-cda3-447c-8d59-990fed536950" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_VipersRevolvingCreditFacilityMember_c9ab0d52-3260-4ac2-8166-f4c54d295795" xlink:href="fang-20210930.xsd#fang_VipersRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5f6e9572-e53e-4432-ad7b-516117c32d89" xlink:to="loc_fang_VipersRevolvingCreditFacilityMember_c9ab0d52-3260-4ac2-8166-f4c54d295795" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_9d9135a9-fb27-425b-bfba-f84acbec23d8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_8409880b-b585-4ccd-841e-39eca723ea8f" xlink:to="loc_srt_StatementGeographicalAxis_9d9135a9-fb27-425b-bfba-f84acbec23d8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_9d9135a9-fb27-425b-bfba-f84acbec23d8_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_9d9135a9-fb27-425b-bfba-f84acbec23d8" xlink:to="loc_srt_SegmentGeographicalDomain_9d9135a9-fb27-425b-bfba-f84acbec23d8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_9b664807-dd15-4b66-b68b-3715c7144bd5" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_9d9135a9-fb27-425b-bfba-f84acbec23d8" xlink:to="loc_srt_SegmentGeographicalDomain_9b664807-dd15-4b66-b68b-3715c7144bd5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_NorthernMidlandBasinMember_ea82109b-41fa-4283-8d0a-7119138d404d" xlink:href="fang-20210930.xsd#fang_NorthernMidlandBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9b664807-dd15-4b66-b68b-3715c7144bd5" xlink:to="loc_fang_NorthernMidlandBasinMember_ea82109b-41fa-4283-8d0a-7119138d404d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_MidlandBasinMember_3ea98360-6b04-42dc-ae5a-bf5b0edd54d4" xlink:href="fang-20210930.xsd#fang_MidlandBasinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9b664807-dd15-4b66-b68b-3715c7144bd5" xlink:to="loc_fang_MidlandBasinMember_3ea98360-6b04-42dc-ae5a-bf5b0edd54d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_7ee32b31-f844-4b48-a69a-e62746c0386e" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_8409880b-b585-4ccd-841e-39eca723ea8f" xlink:to="loc_srt_OwnershipAxis_7ee32b31-f844-4b48-a69a-e62746c0386e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_7ee32b31-f844-4b48-a69a-e62746c0386e_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_7ee32b31-f844-4b48-a69a-e62746c0386e" xlink:to="loc_srt_OwnershipDomain_7ee32b31-f844-4b48-a69a-e62746c0386e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_2064bed8-f445-441b-93ee-22f65a82f094" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_7ee32b31-f844-4b48-a69a-e62746c0386e" xlink:to="loc_srt_OwnershipDomain_2064bed8-f445-441b-93ee-22f65a82f094" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_DiamondbackEnergyIncMember_c9730b7d-e471-46c3-9638-6719fa8c9e36" xlink:href="fang-20210930.xsd#fang_DiamondbackEnergyIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_2064bed8-f445-441b-93ee-22f65a82f094" xlink:to="loc_fang_DiamondbackEnergyIncMember_c9730b7d-e471-46c3-9638-6719fa8c9e36" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_WTGMidstreamLLCMember_83b28dfb-a68e-41d6-9107-c004f59aa9b8" xlink:href="fang-20210930.xsd#fang_WTGMidstreamLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_2064bed8-f445-441b-93ee-22f65a82f094" xlink:to="loc_fang_WTGMidstreamLLCMember_83b28dfb-a68e-41d6-9107-c004f59aa9b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_b6443d92-def3-48fb-9b7f-9ce30b3b74cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_8409880b-b585-4ccd-841e-39eca723ea8f" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_b6443d92-def3-48fb-9b7f-9ce30b3b74cf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b6443d92-def3-48fb-9b7f-9ce30b3b74cf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b6443d92-def3-48fb-9b7f-9ce30b3b74cf" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b6443d92-def3-48fb-9b7f-9ce30b3b74cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ed33b420-84b8-4bb4-b70a-f0c3d3d1b55b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b6443d92-def3-48fb-9b7f-9ce30b3b74cf" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ed33b420-84b8-4bb4-b70a-f0c3d3d1b55b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_RemudaJointVentureAcquisitionMember_bf96a6cc-abef-41bb-a774-4a38b5d0abea" xlink:href="fang-20210930.xsd#fang_RemudaJointVentureAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ed33b420-84b8-4bb4-b70a-f0c3d3d1b55b" xlink:to="loc_fang_RemudaJointVentureAcquisitionMember_bf96a6cc-abef-41bb-a774-4a38b5d0abea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContingentConsiderationByTypeAxis_be7172a4-1205-4b43-835c-d175839bf90b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContingentConsiderationByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_8409880b-b585-4ccd-841e-39eca723ea8f" xlink:to="loc_us-gaap_ContingentConsiderationByTypeAxis_be7172a4-1205-4b43-835c-d175839bf90b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContingentConsiderationTypeDomain_be7172a4-1205-4b43-835c-d175839bf90b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContingentConsiderationTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContingentConsiderationByTypeAxis_be7172a4-1205-4b43-835c-d175839bf90b" xlink:to="loc_us-gaap_ContingentConsiderationTypeDomain_be7172a4-1205-4b43-835c-d175839bf90b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContingentConsiderationTypeDomain_bb8bf0d9-c13d-4a7f-bd11-1c2d43e31ca3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContingentConsiderationTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContingentConsiderationByTypeAxis_be7172a4-1205-4b43-835c-d175839bf90b" xlink:to="loc_us-gaap_ContingentConsiderationTypeDomain_bb8bf0d9-c13d-4a7f-bd11-1c2d43e31ca3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ContingentPaymentDueIn2022Member_7d15e4f1-499a-46bf-a95c-ebdb5e0b5974" xlink:href="fang-20210930.xsd#fang_ContingentPaymentDueIn2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_bb8bf0d9-c13d-4a7f-bd11-1c2d43e31ca3" xlink:to="loc_fang_ContingentPaymentDueIn2022Member_7d15e4f1-499a-46bf-a95c-ebdb5e0b5974" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ContingentPaymentDueIn2024Member_abdca4cf-2fed-4901-b5eb-56142c728c73" xlink:href="fang-20210930.xsd#fang_ContingentPaymentDueIn2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_bb8bf0d9-c13d-4a7f-bd11-1c2d43e31ca3" xlink:to="loc_fang_ContingentPaymentDueIn2024Member_abdca4cf-2fed-4901-b5eb-56142c728c73" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.diamondbackenergy.com/role/SEGMENTINFORMATIONSummaryofBusinessSegmentsDetails" xlink:type="simple" xlink:href="fang-20210930.xsd#SEGMENTINFORMATIONSummaryofBusinessSegmentsDetails"/>
  <link:definitionLink xlink:role="http://www.diamondbackenergy.com/role/SEGMENTINFORMATIONSummaryofBusinessSegmentsDetails" xlink:type="extended" id="ie81e7087f4de4e75b690952ae76a012a_SEGMENTINFORMATIONSummaryofBusinessSegmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_c491a976-6cde-4cd7-877c-633cd392918c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_Revenues_c491a976-6cde-4cd7-877c-633cd392918c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_59b4d1e2-40fb-4873-8ec7-b648aff42c79" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_59b4d1e2-40fb-4873-8ec7-b648aff42c79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfOilAndGasProperties_f1513259-2f30-4134-b0e3-32b81d0d37c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfOilAndGasProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_ImpairmentOfOilAndGasProperties_f1513259-2f30-4134-b0e3-32b81d0d37c6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_ImpairmentOfMidstreamAssets_c84ddf4b-e91b-4241-9016-5e3e8533c724" xlink:href="fang-20210930.xsd#fang_ImpairmentOfMidstreamAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_fang_ImpairmentOfMidstreamAssets_c84ddf4b-e91b-4241-9016-5e3e8533c724" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_b21c0d7d-9185-43ad-86cd-de13cc6ec535" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_OperatingIncomeLoss_b21c0d7d-9185-43ad-86cd-de13cc6ec535" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_43081cd6-17ba-45be-8e36-ac1107710a9c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_43081cd6-17ba-45be-8e36-ac1107710a9c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_80ef287d-f62f-411d-95fa-771398898eb6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_80ef287d-f62f-411d-95fa-771398898eb6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8b6266cc-4382-4ba8-8cf8-c610e611cccd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_8b6266cc-4382-4ba8-8cf8-c610e611cccd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_19f1df39-6c63-4011-b610-af93fa4f237a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_19f1df39-6c63-4011-b610-af93fa4f237a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_9264033b-34bd-47d3-b2b0-1bf8709559a0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_NetIncomeLoss_9264033b-34bd-47d3-b2b0-1bf8709559a0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_da3550d7-9d0e-41f9-b4b7-bf4674a1cb90" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_Assets_da3550d7-9d0e-41f9-b4b7-bf4674a1cb90" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_067fc15d-dbaf-49ff-b0cf-aa1e2e0cdf90" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_d89ea1a1-56b3-49a5-aa71-53ec759e54fe" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_067fc15d-dbaf-49ff-b0cf-aa1e2e0cdf90" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_2cc808e2-64f6-46f9-8a69-1217f70d5fa4" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_067fc15d-dbaf-49ff-b0cf-aa1e2e0cdf90" xlink:to="loc_srt_ConsolidationItemsAxis_2cc808e2-64f6-46f9-8a69-1217f70d5fa4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_2cc808e2-64f6-46f9-8a69-1217f70d5fa4_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_2cc808e2-64f6-46f9-8a69-1217f70d5fa4" xlink:to="loc_srt_ConsolidationItemsDomain_2cc808e2-64f6-46f9-8a69-1217f70d5fa4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_8cb2ad3d-eea2-4b86-8f4f-b5bd22821e72" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_2cc808e2-64f6-46f9-8a69-1217f70d5fa4" xlink:to="loc_srt_ConsolidationItemsDomain_8cb2ad3d-eea2-4b86-8f4f-b5bd22821e72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_c8086082-b529-42cf-9fd2-35fae09f40b5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_8cb2ad3d-eea2-4b86-8f4f-b5bd22821e72" xlink:to="loc_us-gaap_OperatingSegmentsMember_c8086082-b529-42cf-9fd2-35fae09f40b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_da187b69-955e-48bb-8b32-6ea026a0489c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_8cb2ad3d-eea2-4b86-8f4f-b5bd22821e72" xlink:to="loc_us-gaap_IntersegmentEliminationMember_da187b69-955e-48bb-8b32-6ea026a0489c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_04871971-49c1-448b-bc34-9964b5c6437e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_067fc15d-dbaf-49ff-b0cf-aa1e2e0cdf90" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_04871971-49c1-448b-bc34-9964b5c6437e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_04871971-49c1-448b-bc34-9964b5c6437e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_04871971-49c1-448b-bc34-9964b5c6437e" xlink:to="loc_us-gaap_SegmentDomain_04871971-49c1-448b-bc34-9964b5c6437e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a1bbc3f4-9546-4ffc-b4db-3534c710580e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_04871971-49c1-448b-bc34-9964b5c6437e" xlink:to="loc_us-gaap_SegmentDomain_a1bbc3f4-9546-4ffc-b4db-3534c710580e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_UpstreamServicesSegmentMember_2b4f2c66-1bd0-4ede-a69a-0bc0f327ea7d" xlink:href="fang-20210930.xsd#fang_UpstreamServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a1bbc3f4-9546-4ffc-b4db-3534c710580e" xlink:to="loc_fang_UpstreamServicesSegmentMember_2b4f2c66-1bd0-4ede-a69a-0bc0f327ea7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fang_MidstreamOperationsSegmentMember_46126061-812b-4625-98a0-cb90dcf368a4" xlink:href="fang-20210930.xsd#fang_MidstreamOperationsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a1bbc3f4-9546-4ffc-b4db-3534c710580e" xlink:to="loc_fang_MidstreamOperationsSegmentMember_46126061-812b-4625-98a0-cb90dcf368a4" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
