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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e6b5e-ac9a-7cf0-bec8-986a61c1eee6,g:e81b1754-c5de-4415-aff5-bfe135031051-->
<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.entergy.com/role/Cover" xlink:type="simple" xlink:href="etr-20260624.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019e6b5e-ac9a-779b-a0cb-c6bf6f123676" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019e6b5e-ac9a-7052-9596-a472aafafcac" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019e6b5e-ac9a-779b-a0cb-c6bf6f123676" xlink:to="loc_dei_DocumentInformationTable_019e6b5e-ac9a-7052-9596-a472aafafcac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7953-add7-03cf1f0adc52" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019e6b5e-ac9a-7052-9596-a472aafafcac" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7953-add7-03cf1f0adc52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7953-add7-03cf1f0adc52_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7953-add7-03cf1f0adc52" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7953-add7-03cf1f0adc52_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7ebc-a55a-ce8c9f9a7bfe" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7953-add7-03cf1f0adc52" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7ebc-a55a-ce8c9f9a7bfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-74bd-9723-60d954b09499" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7ebc-a55a-ce8c9f9a7bfe" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-74bd-9723-60d954b09499" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e6b5e-ac9a-79c0-b08b-01848fd25ea2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e6b5e-ac9a-779b-a0cb-c6bf6f123676" xlink:to="loc_dei_DocumentType_019e6b5e-ac9a-79c0-b08b-01848fd25ea2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e6b5e-ac9a-76d0-a1e6-d229b816032b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e6b5e-ac9a-779b-a0cb-c6bf6f123676" xlink:to="loc_dei_EntityRegistrantName_019e6b5e-ac9a-76d0-a1e6-d229b816032b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e6b5e-ac9a-7074-b6bf-b68a1150f123" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e6b5e-ac9a-779b-a0cb-c6bf6f123676" xlink:to="loc_dei_AmendmentFlag_019e6b5e-ac9a-7074-b6bf-b68a1150f123" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e6b5e-ac9a-7e57-b46d-9c64b8512eff" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e6b5e-ac9a-779b-a0cb-c6bf6f123676" xlink:to="loc_dei_EntityCentralIndexKey_019e6b5e-ac9a-7e57-b46d-9c64b8512eff" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/STATEMENTSOFNETASSETSAVAILABLEFORBENEFITS" xlink:type="simple" xlink:href="etr-20260624.xsd#STATEMENTSOFNETASSETSAVAILABLEFORBENEFITS"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/STATEMENTSOFNETASSETSAVAILABLEFORBENEFITS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-7f16-af2c-eab4461c5043" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable_019e6b5e-ac9a-7b05-a349-71f8eac07a27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-7f16-af2c-eab4461c5043" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable_019e6b5e-ac9a-7b05-a349-71f8eac07a27" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7395-b54a-5006f3778198" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable_019e6b5e-ac9a-7b05-a349-71f8eac07a27" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7395-b54a-5006f3778198" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7395-b54a-5006f3778198_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7395-b54a-5006f3778198" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7395-b54a-5006f3778198_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7a86-ad4c-29d823b370ee" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7395-b54a-5006f3778198" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7a86-ad4c-29d823b370ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7b75-97c2-c8d0afc8e7cc" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7a86-ad4c-29d823b370ee" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7b75-97c2-c8d0afc8e7cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairAndContractValueAbstract_019e6b5e-ac9a-7516-9f55-728219f55ad1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairAndContractValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-7f16-af2c-eab4461c5043" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairAndContractValueAbstract_019e6b5e-ac9a-7516-9f55-728219f55ad1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue_019e6b5e-ac9a-73a9-a5c9-d33cbcac073c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairAndContractValueAbstract_019e6b5e-ac9a-7516-9f55-728219f55ad1" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue_019e6b5e-ac9a-73a9-a5c9-d33cbcac073c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustContractValue_019e6b5e-ac9a-7032-b0aa-634b90a63cc1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustContractValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairAndContractValueAbstract_019e6b5e-ac9a-7516-9f55-728219f55ad1" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustContractValue_019e6b5e-ac9a-7032-b0aa-634b90a63cc1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairAndContractValue_019e6b5e-ac9a-726f-a116-2a27a09693ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairAndContractValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairAndContractValueAbstract_019e6b5e-ac9a-7516-9f55-728219f55ad1" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairAndContractValue_019e6b5e-ac9a-726f-a116-2a27a09693ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract_019e6b5e-ac9a-77da-ab64-ef56adac7418" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-7f16-af2c-eab4461c5043" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract_019e6b5e-ac9a-77da-ab64-ef56adac7418" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant_019e6b5e-ac9a-7942-8525-ae06dc32a8bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract_019e6b5e-ac9a-77da-ab64-ef56adac7418" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant_019e6b5e-ac9a-7942-8525-ae06dc32a8bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionReceivable_019e6b5e-ac9a-73e3-acf1-5fd52aacffae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerContributionReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract_019e6b5e-ac9a-77da-ab64-ef56adac7418" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionReceivable_019e6b5e-ac9a-73e3-acf1-5fd52aacffae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionReceivable_019e6b5e-ac9a-73b0-ad2e-a8a6c6628b29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanParticipantContributionReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract_019e6b5e-ac9a-77da-ab64-ef56adac7418" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionReceivable_019e6b5e-ac9a-73b0-ad2e-a8a6c6628b29" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReceivable_019e6b5e-ac9a-7dce-a45c-7748d15e0d8f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract_019e6b5e-ac9a-77da-ab64-ef56adac7418" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReceivable_019e6b5e-ac9a-7dce-a45c-7748d15e0d8f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019e6b5e-ac9a-7995-982f-f7d173863e1e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-7f16-af2c-eab4461c5043" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019e6b5e-ac9a-7995-982f-f7d173863e1e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/STATEMENTOFCHANGESINNETASSETSAVAILABLEFORBENEFITS" xlink:type="simple" xlink:href="etr-20260624.xsd#STATEMENTOFCHANGESINNETASSETSAVAILABLEFORBENEFITS"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/STATEMENTOFCHANGESINNETASSETSAVAILABLEFORBENEFITS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-78e9-a95c-40d865e72972" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable_019e6b5e-ac9a-7c5d-bb75-324a74ec1649" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-78e9-a95c-40d865e72972" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable_019e6b5e-ac9a-7c5d-bb75-324a74ec1649" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-79a3-8188-f23702e90ec1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable_019e6b5e-ac9a-7c5d-bb75-324a74ec1649" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-79a3-8188-f23702e90ec1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-79a3-8188-f23702e90ec1_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-79a3-8188-f23702e90ec1" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-79a3-8188-f23702e90ec1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7a90-971e-52f810a4b1a3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-79a3-8188-f23702e90ec1" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7a90-971e-52f810a4b1a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7607-aebf-f7ecc648a633" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7a90-971e-52f810a4b1a3" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7607-aebf-f7ecc648a633" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019e6b5e-ac9a-70aa-960c-1e3ff46ff08a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-78e9-a95c-40d865e72972" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019e6b5e-ac9a-70aa-960c-1e3ff46ff08a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForChangeInPlanInterestInMasterTrust_019e6b5e-ac9a-761d-9bd3-c65096bfc814" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForChangeInPlanInterestInMasterTrust"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019e6b5e-ac9a-70aa-960c-1e3ff46ff08a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForChangeInPlanInterestInMasterTrust_019e6b5e-ac9a-761d-9bd3-c65096bfc814" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnInvestment_019e6b5e-ac9a-7d9b-a451-ec059e113034" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019e6b5e-ac9a-70aa-960c-1e3ff46ff08a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnInvestment_019e6b5e-ac9a-7d9b-a451-ec059e113034" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019e6b5e-ac9a-7ce0-8fae-eb095d7f219c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019e6b5e-ac9a-70aa-960c-1e3ff46ff08a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019e6b5e-ac9a-7ce0-8fae-eb095d7f219c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContribution_019e6b5e-ac9a-7dd4-8336-7eb31fc1d0bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019e6b5e-ac9a-7ce0-8fae-eb095d7f219c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContribution_019e6b5e-ac9a-7dd4-8336-7eb31fc1d0bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution_019e6b5e-ac9a-7440-84b8-5cf202c644d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019e6b5e-ac9a-7ce0-8fae-eb095d7f219c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution_019e6b5e-ac9a-7440-84b8-5cf202c644d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution_019e6b5e-ac9a-749e-b0a7-ace9ec3a758e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_019e6b5e-ac9a-7ce0-8fae-eb095d7f219c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution_019e6b5e-ac9a-749e-b0a7-ace9ec3a758e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForOtherIncomeLossOnInvestment_019e6b5e-ac9a-73ef-b5a0-af85eaf383a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForOtherIncomeLossOnInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019e6b5e-ac9a-70aa-960c-1e3ff46ff08a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForOtherIncomeLossOnInvestment_019e6b5e-ac9a-73ef-b5a0-af85eaf383a2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease_019e6b5e-ac9a-735c-96e3-633cd10c1849" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019e6b5e-ac9a-70aa-960c-1e3ff46ff08a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease_019e6b5e-ac9a-735c-96e3-633cd10c1849" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019e6b5e-ac9a-7195-83bb-d397e1bfac2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-78e9-a95c-40d865e72972" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019e6b5e-ac9a-7195-83bb-d397e1bfac2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant_019e6b5e-ac9a-7fd1-bf21-f6dc3bf8495a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019e6b5e-ac9a-7195-83bb-d397e1bfac2f" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant_019e6b5e-ac9a-7fd1-bf21-f6dc3bf8495a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense_019e6b5e-ac9a-7140-8a48-f65bb8cf0166" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019e6b5e-ac9a-7195-83bb-d397e1bfac2f" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense_019e6b5e-ac9a-7140-8a48-f65bb8cf0166" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease_019e6b5e-ac9a-7717-8071-b21b86610c80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019e6b5e-ac9a-7195-83bb-d397e1bfac2f" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease_019e6b5e-ac9a-7717-8071-b21b86610c80" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease_019e6b5e-ac9a-74f1-a56f-856f2f700f2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-78e9-a95c-40d865e72972" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease_019e6b5e-ac9a-74f1-a56f-856f2f700f2d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract_019e6b5e-ac9a-7794-9d31-1f276a9d625c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019e6b5e-ac9a-78e9-a95c-40d865e72972" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract_019e6b5e-ac9a-7794-9d31-1f276a9d625c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019e6b5e-ac9a-7da3-9685-401ddd6ad3a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract_019e6b5e-ac9a-7794-9d31-1f276a9d625c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019e6b5e-ac9a-7da3-9685-401ddd6ad3a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019e6b5e-ac9a-77c2-b040-a0f8c126e164" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/GeneralDescriptionofthePlan" xlink:type="simple" xlink:href="etr-20260624.xsd#GeneralDescriptionofthePlan"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/GeneralDescriptionofthePlan" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7d7b-8aa8-55c7faea97c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7ca9-9ba8-e7a1d7d97949" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7d7b-8aa8-55c7faea97c0" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7ca9-9ba8-e7a1d7d97949" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7631-82eb-17df077625a3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7ca9-9ba8-e7a1d7d97949" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7631-82eb-17df077625a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7631-82eb-17df077625a3_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7631-82eb-17df077625a3" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7631-82eb-17df077625a3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7985-992e-f82ea175a225" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7631-82eb-17df077625a3" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7985-992e-f82ea175a225" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7774-a8aa-4aeb6ba35817" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7985-992e-f82ea175a225" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7774-a8aa-4aeb6ba35817" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock_019e6b5e-ac9a-7c2a-be5b-6bb7c6e31242" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7d7b-8aa8-55c7faea97c0" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock_019e6b5e-ac9a-7c2a-be5b-6bb7c6e31242" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/SummaryofSignificantAccountingPolicies" xlink:type="simple" xlink:href="etr-20260624.xsd#SummaryofSignificantAccountingPolicies"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/SummaryofSignificantAccountingPolicies" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-702e-b84f-6ce58304c642" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019e6b5e-ac9a-781a-97df-fb14430c1359" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-702e-b84f-6ce58304c642" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019e6b5e-ac9a-781a-97df-fb14430c1359" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7cd3-afd5-d3cd69402fe8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019e6b5e-ac9a-781a-97df-fb14430c1359" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7cd3-afd5-d3cd69402fe8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7cd3-afd5-d3cd69402fe8_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7cd3-afd5-d3cd69402fe8" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7cd3-afd5-d3cd69402fe8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-74f1-84c3-b7aa021e7a7f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7cd3-afd5-d3cd69402fe8" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-74f1-84c3-b7aa021e7a7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7218-b25a-c4492f56ef62" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-74f1-84c3-b7aa021e7a7f" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7218-b25a-c4492f56ef62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock_019e6b5e-ac9a-73c8-b848-889d0d0cf263" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-702e-b84f-6ce58304c642" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock_019e6b5e-ac9a-73c8-b848-889d0d0cf263" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/FairValueMeasurements" xlink:type="simple" xlink:href="etr-20260624.xsd#FairValueMeasurements"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/FairValueMeasurements" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems_019e6b5e-ac9a-71e6-ae90-98ea0049ccb1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTable_019e6b5e-ac9a-76c1-8dac-b0697978fbc6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems_019e6b5e-ac9a-71e6-ae90-98ea0049ccb1" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTable_019e6b5e-ac9a-76c1-8dac-b0697978fbc6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7257-acae-7fdd07b6723b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTable_019e6b5e-ac9a-76c1-8dac-b0697978fbc6" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7257-acae-7fdd07b6723b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7257-acae-7fdd07b6723b_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7257-acae-7fdd07b6723b" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7257-acae-7fdd07b6723b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-705a-8a42-fb123844d739" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7257-acae-7fdd07b6723b" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-705a-8a42-fb123844d739" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-700c-bcba-c90ed2bdb440" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-705a-8a42-fb123844d739" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-700c-bcba-c90ed2bdb440" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock_019e6b5e-ac9a-75a1-9489-1098eb681809" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems_019e6b5e-ac9a-71e6-ae90-98ea0049ccb1" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock_019e6b5e-ac9a-75a1-9489-1098eb681809" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/InvestmentContractsWithInsuranceCompanies" xlink:type="simple" xlink:href="etr-20260624.xsd#InvestmentContractsWithInsuranceCompanies"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/InvestmentContractsWithInsuranceCompanies" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractLineItems_019e6b5e-ac9a-7bd5-954f-765e734b1d2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractTable_019e6b5e-ac9a-7df9-9431-a46d93063602" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractLineItems_019e6b5e-ac9a-7bd5-954f-765e734b1d2a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractTable_019e6b5e-ac9a-7df9-9431-a46d93063602" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-727c-9c53-f6e930efd187" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractTable_019e6b5e-ac9a-7df9-9431-a46d93063602" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-727c-9c53-f6e930efd187" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-727c-9c53-f6e930efd187_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-727c-9c53-f6e930efd187" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-727c-9c53-f6e930efd187_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7f56-8281-54c76026b60d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-727c-9c53-f6e930efd187" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7f56-8281-54c76026b60d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7f50-82d7-5e69ff2cbafa" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7f56-8281-54c76026b60d" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7f50-82d7-5e69ff2cbafa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPInvestmentTextBlock_019e6b5e-ac9a-7aad-ab8a-11efe5e2a704" xlink:href="etr-20260624.xsd#etr_EBPInvestmentTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractLineItems_019e6b5e-ac9a-7bd5-954f-765e734b1d2a" xlink:to="loc_etr_EBPInvestmentTextBlock_019e6b5e-ac9a-7aad-ab8a-11efe5e2a704" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/InterestInMasterTrust" xlink:type="simple" xlink:href="etr-20260624.xsd#InterestInMasterTrust"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/InterestInMasterTrust" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7bd3-883e-bab495f299d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7ef3-96f8-001daf6e3721" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7bd3-883e-bab495f299d2" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7ef3-96f8-001daf6e3721" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-71af-8e64-c48301e9d999" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7ef3-96f8-001daf6e3721" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-71af-8e64-c48301e9d999" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-71af-8e64-c48301e9d999_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-71af-8e64-c48301e9d999" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-71af-8e64-c48301e9d999_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-773c-84ed-88ddcc7c9989" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-71af-8e64-c48301e9d999" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-773c-84ed-88ddcc7c9989" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7770-bc24-94bf9ab0f59f" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-773c-84ed-88ddcc7c9989" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7770-bc24-94bf9ab0f59f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTextBlock_019e6b5e-ac9a-74ec-8c75-9d80c4ae212d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7bd3-883e-bab495f299d2" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTextBlock_019e6b5e-ac9a-74ec-8c75-9d80c4ae212d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/TaxStatus" xlink:type="simple" xlink:href="etr-20260624.xsd#TaxStatus"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/TaxStatus" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems_019e6b5e-ac9a-7713-8679-d946ea017171" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable_019e6b5e-ac9a-7551-b9c4-29a11a7caa23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems_019e6b5e-ac9a-7713-8679-d946ea017171" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable_019e6b5e-ac9a-7551-b9c4-29a11a7caa23" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7553-b5a7-38297d923631" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable_019e6b5e-ac9a-7551-b9c4-29a11a7caa23" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7553-b5a7-38297d923631" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7553-b5a7-38297d923631_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7553-b5a7-38297d923631" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7553-b5a7-38297d923631_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7639-ad46-003fbcf8be0f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7553-b5a7-38297d923631" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7639-ad46-003fbcf8be0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-794b-9a6c-a82dc9ca4c2f" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7639-ad46-003fbcf8be0f" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-794b-9a6c-a82dc9ca4c2f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock_019e6b5e-ac9a-7494-ab09-61b4a3dc5a93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems_019e6b5e-ac9a-7713-8679-d946ea017171" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock_019e6b5e-ac9a-7494-ab09-61b4a3dc5a93" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/EntergySavingsPlanTermination" xlink:type="simple" xlink:href="etr-20260624.xsd#EntergySavingsPlanTermination"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/EntergySavingsPlanTermination" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7f28-8d30-0ea126d41af5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7272-80a0-94fedb350c14" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7f28-8d30-0ea126d41af5" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7272-80a0-94fedb350c14" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-722b-9fc1-daf6c6214d39" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7272-80a0-94fedb350c14" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-722b-9fc1-daf6c6214d39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-722b-9fc1-daf6c6214d39_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-722b-9fc1-daf6c6214d39" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-722b-9fc1-daf6c6214d39_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7dcb-96b8-3d32e67576a1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-722b-9fc1-daf6c6214d39" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7dcb-96b8-3d32e67576a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-77b0-9bfa-68b0ac8baef9" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7dcb-96b8-3d32e67576a1" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-77b0-9bfa-68b0ac8baef9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanPlanTerminationTextBlock_019e6b5e-ac9a-7fe6-9c4f-d76d25e02374" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanPlanTerminationTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7f28-8d30-0ea126d41af5" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanPlanTerminationTextBlock_019e6b5e-ac9a-7fe6-9c4f-d76d25e02374" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/RelatedPartyTransactionsandExemptPartyInInterestTransactions" xlink:type="simple" xlink:href="etr-20260624.xsd#RelatedPartyTransactionsandExemptPartyInInterestTransactions"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/RelatedPartyTransactionsandExemptPartyInInterestTransactions" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019e6b5e-ac9a-7d9f-80d2-4d2922a2bf66" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019e6b5e-ac9a-7a1f-9a5a-13b06a2ea359" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019e6b5e-ac9a-7d9f-80d2-4d2922a2bf66" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019e6b5e-ac9a-7a1f-9a5a-13b06a2ea359" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7f09-8b93-54f717ce9cb0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019e6b5e-ac9a-7a1f-9a5a-13b06a2ea359" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7f09-8b93-54f717ce9cb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7f09-8b93-54f717ce9cb0_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7f09-8b93-54f717ce9cb0" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7f09-8b93-54f717ce9cb0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7f30-9984-f32057997d82" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7f09-8b93-54f717ce9cb0" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7f30-9984-f32057997d82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-79b0-9b1d-2f3c9562def5" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7f30-9984-f32057997d82" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-79b0-9b1d-2f3c9562def5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock_019e6b5e-ac9a-7687-a283-fc61bb983918" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019e6b5e-ac9a-7d9f-80d2-4d2922a2bf66" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock_019e6b5e-ac9a-7687-a283-fc61bb983918" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/ReconciliationtoForm5500" xlink:type="simple" xlink:href="etr-20260624.xsd#ReconciliationtoForm5500"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/ReconciliationtoForm5500" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7ec9-ac5c-a1bfc770ac78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-73c8-8913-b88977476749" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7ec9-ac5c-a1bfc770ac78" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-73c8-8913-b88977476749" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7c88-aef1-ae709bb09d44" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-73c8-8913-b88977476749" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7c88-aef1-ae709bb09d44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-7c88-aef1-ae709bb09d44_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7c88-aef1-ae709bb09d44" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-7c88-aef1-ae709bb09d44_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-714d-85ba-4a805a93bbd2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7c88-aef1-ae709bb09d44" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-714d-85ba-4a805a93bbd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9b-712e-8fb2-3a50e1afb689" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9b-714d-85ba-4a805a93bbd2" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9b-712e-8fb2-3a50e1afb689" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TextBlock_019e6b5e-ac9b-7a94-a079-c673576388e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7ec9-ac5c-a1bfc770ac78" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TextBlock_019e6b5e-ac9b-7a94-a079-c673576388e1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/SubsequentEvents" xlink:type="simple" xlink:href="etr-20260624.xsd#SubsequentEvents"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/SubsequentEvents" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EbpSubsequentEventLineItems_019e6b5e-ac9b-7663-bd76-2602affecf7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EbpSubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EbpSubsequentEventTable_019e6b5e-ac9b-7a5a-9a54-be8d9253bef5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EbpSubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EbpSubsequentEventLineItems_019e6b5e-ac9b-7663-bd76-2602affecf7b" xlink:to="loc_us-gaap-ebp_EbpSubsequentEventTable_019e6b5e-ac9b-7a5a-9a54-be8d9253bef5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9b-719f-b062-a88fee739ce7" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EbpSubsequentEventTable_019e6b5e-ac9b-7a5a-9a54-be8d9253bef5" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9b-719f-b062-a88fee739ce7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-719f-b062-a88fee739ce7_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-719f-b062-a88fee739ce7" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-719f-b062-a88fee739ce7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-7178-a9b6-c19058d3d503" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-719f-b062-a88fee739ce7" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-7178-a9b6-c19058d3d503" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9b-72cc-b898-04fe8041ed3c" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9b-7178-a9b6-c19058d3d503" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9b-72cc-b898-04fe8041ed3c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventTextBlock_019e6b5e-ac9b-76c6-9a36-4a818eee0e29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanSubsequentEventTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EbpSubsequentEventLineItems_019e6b5e-ac9b-7663-bd76-2602affecf7b" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventTextBlock_019e6b5e-ac9b-76c6-9a36-4a818eee0e29" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/ScheduleofAssetsHeldatEndofYear" xlink:type="simple" xlink:href="etr-20260624.xsd#ScheduleofAssetsHeldatEndofYear"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/ScheduleofAssetsHeldatEndofYear" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019e6b5e-ac9b-7978-94db-2cc6d12e8170" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019e6b5e-ac9b-7c7e-bd41-ec258495b323" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019e6b5e-ac9b-7978-94db-2cc6d12e8170" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019e6b5e-ac9b-7c7e-bd41-ec258495b323" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7cba-ba13-0aec8e689846" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019e6b5e-ac9b-7c7e-bd41-ec258495b323" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7cba-ba13-0aec8e689846" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-7cba-ba13-0aec8e689846_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7cba-ba13-0aec8e689846" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-7cba-ba13-0aec8e689846_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-7157-ad18-4045d4ec1900" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7cba-ba13-0aec8e689846" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-7157-ad18-4045d4ec1900" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9b-7a91-b62f-da6ebd1b1050" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9b-7157-ad18-4045d4ec1900" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9b-7a91-b62f-da6ebd1b1050" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock_019e6b5e-ac9b-7a97-b240-6adda4ed56a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019e6b5e-ac9b-7978-94db-2cc6d12e8170" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock_019e6b5e-ac9b-7a97-b240-6adda4ed56a5" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/SummaryofSignificantAccountingPoliciesPolicies" xlink:type="simple" xlink:href="etr-20260624.xsd#SummaryofSignificantAccountingPoliciesPolicies"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/SummaryofSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019e6b5e-ac9a-75f6-98d4-8fc8933f8b1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019e6b5e-ac9a-75f6-98d4-8fc8933f8b1b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-773e-98d5-de9b508e1650" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019e6b5e-ac9a-75f6-98d4-8fc8933f8b1b" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-773e-98d5-de9b508e1650" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-773e-98d5-de9b508e1650_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-773e-98d5-de9b508e1650" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-773e-98d5-de9b508e1650_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7d31-be82-6f9daa5be05d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-773e-98d5-de9b508e1650" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7d31-be82-6f9daa5be05d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-740b-9754-ed9d75b1eb4f" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7d31-be82-6f9daa5be05d" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-740b-9754-ed9d75b1eb4f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock_019e6b5e-ac9a-706e-b2db-08148e4d8893" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock_019e6b5e-ac9a-706e-b2db-08148e4d8893" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock_019e6b5e-ac9a-7a88-acea-800635f6e044" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock_019e6b5e-ac9a-7a88-acea-800635f6e044" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustPolicyTextBlock_019e6b5e-ac9a-7a84-b18c-983722adf8c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustPolicyTextBlock_019e6b5e-ac9a-7a84-b18c-983722adf8c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock_019e6b5e-ac9a-703a-97aa-50f88f0a3201" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock_019e6b5e-ac9a-703a-97aa-50f88f0a3201" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock_019e6b5e-ac9a-7a9a-9329-09586e240d6c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock_019e6b5e-ac9a-7a9a-9329-09586e240d6c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock_019e6b5e-ac9a-71e8-aef0-242a21141603" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock_019e6b5e-ac9a-71e8-aef0-242a21141603" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EbpRiskAndUncertaintyPolicyTextBlock_019e6b5e-ac9a-72cb-877e-aa2cba71ec9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EbpRiskAndUncertaintyPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:to="loc_us-gaap-ebp_EbpRiskAndUncertaintyPolicyTextBlock_019e6b5e-ac9a-72cb-877e-aa2cba71ec9a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock_019e6b5e-ac9a-7ce8-862f-b279906ea6b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock_019e6b5e-ac9a-7ce8-862f-b279906ea6b7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPIncomeRecognitionPolicyTextBlock_019e6b5e-ac9a-7db9-8ce1-612794e462a9" xlink:href="etr-20260624.xsd#etr_EBPIncomeRecognitionPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7887-9a0f-20308b26464a" xlink:to="loc_etr_EBPIncomeRecognitionPolicyTextBlock_019e6b5e-ac9a-7db9-8ce1-612794e462a9" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/FairValueMeasurementsTables" xlink:type="simple" xlink:href="etr-20260624.xsd#FairValueMeasurementsTables"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/FairValueMeasurementsTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems_019e6b5e-ac9a-7b9a-aed5-89d641b8aa66" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTable_019e6b5e-ac9a-7b96-8e2e-eae124a1d28f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems_019e6b5e-ac9a-7b9a-aed5-89d641b8aa66" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTable_019e6b5e-ac9a-7b96-8e2e-eae124a1d28f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-72d8-ab88-a41b56a2a736" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTable_019e6b5e-ac9a-7b96-8e2e-eae124a1d28f" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-72d8-ab88-a41b56a2a736" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-72d8-ab88-a41b56a2a736_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-72d8-ab88-a41b56a2a736" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-72d8-ab88-a41b56a2a736_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7a11-b333-3506d527bd3d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-72d8-ab88-a41b56a2a736" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7a11-b333-3506d527bd3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7866-8512-291b62bdc883" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7a11-b333-3506d527bd3d" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7866-8512-291b62bdc883" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock_019e6b5e-ac9a-7061-9749-7c27dbdcd78d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems_019e6b5e-ac9a-7b9a-aed5-89d641b8aa66" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock_019e6b5e-ac9a-7061-9749-7c27dbdcd78d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/InterestInMasterTrustTables" xlink:type="simple" xlink:href="etr-20260624.xsd#InterestInMasterTrustTables"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/InterestInMasterTrustTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7385-9a9e-6eed4c6ae490" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-786a-806c-7ac6771d1fb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7385-9a9e-6eed4c6ae490" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-786a-806c-7ac6771d1fb5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7dc8-8a74-698f25715661" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-786a-806c-7ac6771d1fb5" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7dc8-8a74-698f25715661" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7dc8-8a74-698f25715661_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7dc8-8a74-698f25715661" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7dc8-8a74-698f25715661_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7c94-9d6e-29a332dd1bd6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7dc8-8a74-698f25715661" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7c94-9d6e-29a332dd1bd6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7b0d-8e64-9d6a2539da68" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7c94-9d6e-29a332dd1bd6" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7b0d-8e64-9d6a2539da68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTableTextBlock_019e6b5e-ac9a-737c-b8ba-9884d883ea4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7385-9a9e-6eed4c6ae490" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTableTextBlock_019e6b5e-ac9a-737c-b8ba-9884d883ea4e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/ReconciliationtoForm5500Tables" xlink:type="simple" xlink:href="etr-20260624.xsd#ReconciliationtoForm5500Tables"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/ReconciliationtoForm5500Tables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-798c-87f2-5022d4bc35be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-71b9-b642-bffcf60b620c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-798c-87f2-5022d4bc35be" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-71b9-b642-bffcf60b620c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9b-77a0-a52f-334ca27bcf4a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-71b9-b642-bffcf60b620c" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9b-77a0-a52f-334ca27bcf4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-77a0-a52f-334ca27bcf4a_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-77a0-a52f-334ca27bcf4a" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-77a0-a52f-334ca27bcf4a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-7a0f-ac95-93896c9689f0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-77a0-a52f-334ca27bcf4a" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-7a0f-ac95-93896c9689f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9b-7c6e-8423-c71d829a2572" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9b-7a0f-ac95-93896c9689f0" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9b-7c6e-8423-c71d829a2572" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TableTextBlock_019e6b5e-ac9b-731f-b988-6129cb4e894f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-798c-87f2-5022d4bc35be" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TableTextBlock_019e6b5e-ac9b-731f-b988-6129cb4e894f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/GeneralDescriptionofthePlanDetails" xlink:type="simple" xlink:href="etr-20260624.xsd#GeneralDescriptionofthePlanDetails"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/GeneralDescriptionofthePlanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7d7d-88c2-c769f5e6fc62" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7d7d-88c2-c769f5e6fc62" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-73b5-8cfa-6594b581292a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7d7d-88c2-c769f5e6fc62" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-73b5-8cfa-6594b581292a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-73b5-8cfa-6594b581292a_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-73b5-8cfa-6594b581292a" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-73b5-8cfa-6594b581292a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7283-adf8-e37c878dc4b1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-73b5-8cfa-6594b581292a" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7283-adf8-e37c878dc4b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7a88-9ad8-7447499a40a6" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7283-adf8-e37c878dc4b1" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7a88-9ad8-7447499a40a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e6b5e-ac9a-7c29-9806-7fd0e4eaf597" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7d7d-88c2-c769f5e6fc62" xlink:to="loc_srt_RangeAxis_019e6b5e-ac9a-7c29-9806-7fd0e4eaf597" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e6b5e-ac9a-7c29-9806-7fd0e4eaf597_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e6b5e-ac9a-7c29-9806-7fd0e4eaf597" xlink:to="loc_srt_RangeMember_019e6b5e-ac9a-7c29-9806-7fd0e4eaf597_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e6b5e-ac9a-7c96-93af-0f2458bd4647" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e6b5e-ac9a-7c29-9806-7fd0e4eaf597" xlink:to="loc_srt_RangeMember_019e6b5e-ac9a-7c96-93af-0f2458bd4647" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e6b5e-ac9a-7713-bc71-eacb77073bd6" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e6b5e-ac9a-7c96-93af-0f2458bd4647" xlink:to="loc_srt_MinimumMember_019e6b5e-ac9a-7713-bc71-eacb77073bd6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e6b5e-ac9a-75ec-96be-39b9e54a2498" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e6b5e-ac9a-7c96-93af-0f2458bd4647" xlink:to="loc_srt_MaximumMember_019e6b5e-ac9a-75ec-96be-39b9e54a2498" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPEmployerContributionTypeAxis_019e6b5e-ac9a-7152-846b-19ddb89d6bd1" xlink:href="etr-20260624.xsd#etr_EBPEmployerContributionTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019e6b5e-ac9a-7d7d-88c2-c769f5e6fc62" xlink:to="loc_etr_EBPEmployerContributionTypeAxis_019e6b5e-ac9a-7152-846b-19ddb89d6bd1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPEmployerContributionTypeDomain_019e6b5e-ac9a-7152-846b-19ddb89d6bd1_default" xlink:href="etr-20260624.xsd#etr_EBPEmployerContributionTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_etr_EBPEmployerContributionTypeAxis_019e6b5e-ac9a-7152-846b-19ddb89d6bd1" xlink:to="loc_etr_EBPEmployerContributionTypeDomain_019e6b5e-ac9a-7152-846b-19ddb89d6bd1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPEmployerContributionTypeDomain_019e6b5e-ac9a-721b-8d11-b573e970efc4" xlink:href="etr-20260624.xsd#etr_EBPEmployerContributionTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_etr_EBPEmployerContributionTypeAxis_019e6b5e-ac9a-7152-846b-19ddb89d6bd1" xlink:to="loc_etr_EBPEmployerContributionTypeDomain_019e6b5e-ac9a-721b-8d11-b573e970efc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPEmployerMatchingContributionBargainingEmployeesMember_019e6b5e-ac9a-7d23-8b89-80c63d70c864" xlink:href="etr-20260624.xsd#etr_EBPEmployerMatchingContributionBargainingEmployeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_etr_EBPEmployerContributionTypeDomain_019e6b5e-ac9a-721b-8d11-b573e970efc4" xlink:to="loc_etr_EBPEmployerMatchingContributionBargainingEmployeesMember_019e6b5e-ac9a-7d23-8b89-80c63d70c864" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPEmployerMatchingContributionNonBargainingEmployeesMember_019e6b5e-ac9a-719f-8cfe-5dea56afda65" xlink:href="etr-20260624.xsd#etr_EBPEmployerMatchingContributionNonBargainingEmployeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_etr_EBPEmployerContributionTypeDomain_019e6b5e-ac9a-721b-8d11-b573e970efc4" xlink:to="loc_etr_EBPEmployerMatchingContributionNonBargainingEmployeesMember_019e6b5e-ac9a-719f-8cfe-5dea56afda65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate_019e6b5e-ac9a-792a-86bc-02a658e7b771" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate_019e6b5e-ac9a-792a-86bc-02a658e7b771" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPRequisiteServicePeriod_019e6b5e-ac9a-7c90-b654-03c926beb6fc" xlink:href="etr-20260624.xsd#etr_EBPRequisiteServicePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPRequisiteServicePeriod_019e6b5e-ac9a-7c90-b654-03c926beb6fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPParticipantContributionAutomaticAnnualIncreaseDeferralRate_019e6b5e-ac9a-7ab7-adc8-6cd0b83417fa" xlink:href="etr-20260624.xsd#etr_EBPParticipantContributionAutomaticAnnualIncreaseDeferralRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPParticipantContributionAutomaticAnnualIncreaseDeferralRate_019e6b5e-ac9a-7ab7-adc8-6cd0b83417fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage_019e6b5e-ac9a-7f1d-9580-43e8069dca2f" xlink:href="etr-20260624.xsd#etr_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage_019e6b5e-ac9a-7f1d-9580-43e8069dca2f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPParticipantContributionPretaxMaximumAnnualSupplementalCompensationToTotalCompensationPercentage_019e6b5e-ac9a-7360-9211-3f07dbe72aeb" xlink:href="etr-20260624.xsd#etr_EBPParticipantContributionPretaxMaximumAnnualSupplementalCompensationToTotalCompensationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPParticipantContributionPretaxMaximumAnnualSupplementalCompensationToTotalCompensationPercentage_019e6b5e-ac9a-7360-9211-3f07dbe72aeb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage_019e6b5e-ac9a-70c5-badf-36f99196262f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage_019e6b5e-ac9a-70c5-badf-36f99196262f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPEmployerContributionMatchingPerDollarAmount_019e6b5e-ac9a-7b86-b7ff-909ff72cdd06" xlink:href="etr-20260624.xsd#etr_EBPEmployerContributionMatchingPerDollarAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPEmployerContributionMatchingPerDollarAmount_019e6b5e-ac9a-7b86-b7ff-909ff72cdd06" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage_019e6b5e-ac9a-76c6-bc2f-0218a599730e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage_019e6b5e-ac9a-76c6-bc2f-0218a599730e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPInvestmentParticipantPercentageOfInvestmentInFundMaximum_019e6b5e-ac9a-717b-b600-22a644c1885d" xlink:href="etr-20260624.xsd#etr_EBPInvestmentParticipantPercentageOfInvestmentInFundMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPInvestmentParticipantPercentageOfInvestmentInFundMaximum_019e6b5e-ac9a-717b-b600-22a644c1885d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount_019e6b5e-ac9a-77f2-8b95-c75f57d3ce8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount_019e6b5e-ac9a-77f2-8b95-c75f57d3ce8a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage_019e6b5e-ac9a-72f3-8897-4997e2c46d23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage_019e6b5e-ac9a-72f3-8897-4997e2c46d23" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount_019e6b5e-ac9a-7e3e-afcd-f1f0170fbd6b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount_019e6b5e-ac9a-7e3e-afcd-f1f0170fbd6b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPParticipantLoanBasisSpreadOnVariableRate_019e6b5e-ac9a-7572-8f2d-cce86a451517" xlink:href="etr-20260624.xsd#etr_EBPParticipantLoanBasisSpreadOnVariableRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPParticipantLoanBasisSpreadOnVariableRate_019e6b5e-ac9a-7572-8f2d-cce86a451517" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm_019e6b5e-ac9a-7b2a-b8d2-068bbb460d2f" xlink:href="etr-20260624.xsd#etr_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm_019e6b5e-ac9a-7b2a-b8d2-068bbb460d2f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm_019e6b5e-ac9a-7e61-83cd-970901f7200c" xlink:href="etr-20260624.xsd#etr_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm_019e6b5e-ac9a-7e61-83cd-970901f7200c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPInactiveAccountsCumulativeDistributionsToParticipants_019e6b5e-ac9a-7f6b-9031-764e6562cce4" xlink:href="etr-20260624.xsd#etr_EBPInactiveAccountsCumulativeDistributionsToParticipants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPInactiveAccountsCumulativeDistributionsToParticipants_019e6b5e-ac9a-7f6b-9031-764e6562cce4" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccount_019e6b5e-ac9a-752e-8bb8-be7a778dbae3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccount_019e6b5e-ac9a-752e-8bb8-be7a778dbae3" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForEmployerContribution_019e6b5e-ac9a-74cb-b272-b695cc95fdcd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForEmployerContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForEmployerContribution_019e6b5e-ac9a-74cb-b272-b695cc95fdcd" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPInvoluntaryCashOutLimit_019e6b5e-ac9a-73c3-bf61-9680da576462" xlink:href="etr-20260624.xsd#etr_EBPInvoluntaryCashOutLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019e6b5e-ac9a-7a17-adf5-36e295294172" xlink:to="loc_etr_EBPInvoluntaryCashOutLimit_019e6b5e-ac9a-73c3-bf61-9680da576462" xlink:type="arc" order="18"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/SummaryofSignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="etr-20260624.xsd#SummaryofSignificantAccountingPoliciesDetails"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/SummaryofSignificantAccountingPoliciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7a74-993e-d388f06bff5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019e6b5e-ac9a-7bbf-8ffc-e5adff847d66" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7a74-993e-d388f06bff5e" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019e6b5e-ac9a-7bbf-8ffc-e5adff847d66" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7d8c-8c1c-6a994ab6d87c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019e6b5e-ac9a-7bbf-8ffc-e5adff847d66" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7d8c-8c1c-6a994ab6d87c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7d8c-8c1c-6a994ab6d87c_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7d8c-8c1c-6a994ab6d87c" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7d8c-8c1c-6a994ab6d87c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7340-95cd-7566867ced99" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7d8c-8c1c-6a994ab6d87c" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7340-95cd-7566867ced99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7726-884f-95b188ace800" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7340-95cd-7566867ced99" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7726-884f-95b188ace800" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantLiability_019e6b5e-ac9a-7f63-abe4-c61eaa6814ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanParticipantLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019e6b5e-ac9a-7a74-993e-d388f06bff5e" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantLiability_019e6b5e-ac9a-7f63-abe4-c61eaa6814ce" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/FairValueMeasurementsDetails" xlink:type="simple" xlink:href="etr-20260624.xsd#FairValueMeasurementsDetails"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/FairValueMeasurementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-78f0-9953-e1a5fde78cce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7c6b-96b2-a8ebd832f8b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-78f0-9953-e1a5fde78cce" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7c6b-96b2-a8ebd832f8b8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e6b5e-ac9a-71fc-909f-d9477decd30a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7c6b-96b2-a8ebd832f8b8" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e6b5e-ac9a-71fc-909f-d9477decd30a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-71fc-909f-d9477decd30a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e6b5e-ac9a-71fc-909f-d9477decd30a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-71fc-909f-d9477decd30a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-7343-8a07-3d3ce6fb9110" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e6b5e-ac9a-71fc-909f-d9477decd30a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-7343-8a07-3d3ce6fb9110" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel12And3Member_019e6b5e-ac9a-71ff-ab01-ff8facc59cda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel12And3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-7343-8a07-3d3ce6fb9110" xlink:to="loc_us-gaap_FairValueInputsLevel12And3Member_019e6b5e-ac9a-71ff-ab01-ff8facc59cda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e6b5e-ac9a-78fa-903b-b36a929ff7cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_019e6b5e-ac9a-71ff-ab01-ff8facc59cda" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e6b5e-ac9a-78fa-903b-b36a929ff7cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e6b5e-ac9a-782c-86a2-10b11812b3ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_019e6b5e-ac9a-71ff-ab01-ff8facc59cda" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e6b5e-ac9a-782c-86a2-10b11812b3ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e6b5e-ac9a-701d-b41e-ba257227a9c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_019e6b5e-ac9a-71ff-ab01-ff8facc59cda" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e6b5e-ac9a-701d-b41e-ba257227a9c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e6b5e-ac9a-7ed9-b6d0-38071c8cbcf8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-7343-8a07-3d3ce6fb9110" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e6b5e-ac9a-7ed9-b6d0-38071c8cbcf8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7b7b-840c-a2f9871378d5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7c6b-96b2-a8ebd832f8b8" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7b7b-840c-a2f9871378d5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7b7b-840c-a2f9871378d5_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7b7b-840c-a2f9871378d5" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7b7b-840c-a2f9871378d5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7234-812a-169dfe4af0fe" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7b7b-840c-a2f9871378d5" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7234-812a-169dfe4af0fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-70cf-a836-25312694885e" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7234-812a-169dfe4af0fe" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-70cf-a836-25312694885e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9a-7dc5-8ed7-8febfc31544b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7c6b-96b2-a8ebd832f8b8" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9a-7dc5-8ed7-8febfc31544b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-7dc5-8ed7-8febfc31544b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9a-7dc5-8ed7-8febfc31544b" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-7dc5-8ed7-8febfc31544b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-7808-90ed-dac4a58dd2ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9a-7dc5-8ed7-8febfc31544b" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-7808-90ed-dac4a58dd2ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019e6b5e-ac9a-766c-8714-42ab72e23879" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-7808-90ed-dac4a58dd2ed" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019e6b5e-ac9a-766c-8714-42ab72e23879" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e6b5e-ac9a-7826-b178-ef4ad3fbebbe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-7808-90ed-dac4a58dd2ed" xlink:to="loc_us-gaap_CommonStockMember_019e6b5e-ac9a-7826-b178-ef4ad3fbebbe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_019e6b5e-ac9a-7513-810e-74134cc2380a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-7808-90ed-dac4a58dd2ed" xlink:to="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_019e6b5e-ac9a-7513-810e-74134cc2380a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember_019e6b5e-ac9a-7e67-a9d4-bd0de6067825" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-7808-90ed-dac4a58dd2ed" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember_019e6b5e-ac9a-7e67-a9d4-bd0de6067825" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019e6b5e-ac9a-7cc3-8b59-174449e52376" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7c6b-96b2-a8ebd832f8b8" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019e6b5e-ac9a-7cc3-8b59-174449e52376" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-7cc3-8b59-174449e52376_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019e6b5e-ac9a-7cc3-8b59-174449e52376" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-7cc3-8b59-174449e52376_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-724b-aa0e-01b76a309b5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019e6b5e-ac9a-7cc3-8b59-174449e52376" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-724b-aa0e-01b76a309b5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019e6b5e-ac9a-748b-b01f-85fb46cbeb92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-724b-aa0e-01b76a309b5d" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019e6b5e-ac9a-748b-b01f-85fb46cbeb92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue_019e6b5e-ac9a-71ba-9789-4766e57951d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-78f0-9953-e1a5fde78cce" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue_019e6b5e-ac9a-71ba-9789-4766e57951d1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/InterestInMasterTrustDetails" xlink:type="simple" xlink:href="etr-20260624.xsd#InterestInMasterTrustDetails"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/InterestInMasterTrustDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7694-9d42-c9d82ed6c453" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7e9b-ac18-de80ca0ad9c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7694-9d42-c9d82ed6c453" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7e9b-ac18-de80ca0ad9c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e6b5e-ac9a-7ba8-93f7-8ecbdbb6ed4a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7e9b-ac18-de80ca0ad9c9" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e6b5e-ac9a-7ba8-93f7-8ecbdbb6ed4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-7ba8-93f7-8ecbdbb6ed4a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e6b5e-ac9a-7ba8-93f7-8ecbdbb6ed4a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-7ba8-93f7-8ecbdbb6ed4a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-789b-b594-9daf77850bf5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e6b5e-ac9a-7ba8-93f7-8ecbdbb6ed4a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-789b-b594-9daf77850bf5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel12And3Member_019e6b5e-ac9a-73ce-9f26-94920b9a3d60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel12And3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e6b5e-ac9a-789b-b594-9daf77850bf5" xlink:to="loc_us-gaap_FairValueInputsLevel12And3Member_019e6b5e-ac9a-73ce-9f26-94920b9a3d60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9a-7d18-96b1-7e1dd67c1b04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7e9b-ac18-de80ca0ad9c9" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9a-7d18-96b1-7e1dd67c1b04" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-7d18-96b1-7e1dd67c1b04_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9a-7d18-96b1-7e1dd67c1b04" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-7d18-96b1-7e1dd67c1b04_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-710a-a737-75fbd59fa671" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9a-7d18-96b1-7e1dd67c1b04" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-710a-a737-75fbd59fa671" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019e6b5e-ac9a-7ab5-981f-bb5d967c90e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-710a-a737-75fbd59fa671" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019e6b5e-ac9a-7ab5-981f-bb5d967c90e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e6b5e-ac9a-759a-8b9b-996fe96480d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-710a-a737-75fbd59fa671" xlink:to="loc_us-gaap_CommonStockMember_019e6b5e-ac9a-759a-8b9b-996fe96480d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_019e6b5e-ac9a-7d44-bcc1-97ddb0616854" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-710a-a737-75fbd59fa671" xlink:to="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_019e6b5e-ac9a-7d44-bcc1-97ddb0616854" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember_019e6b5e-ac9a-7d99-b7e7-bd65864a537b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9a-710a-a737-75fbd59fa671" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanSelfDirectedBrokerageAccountMember_019e6b5e-ac9a-7d99-b7e7-bd65864a537b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-75a5-8404-60559925fb21" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7e9b-ac18-de80ca0ad9c9" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-75a5-8404-60559925fb21" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-75a5-8404-60559925fb21_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-75a5-8404-60559925fb21" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-75a5-8404-60559925fb21_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7312-970b-af2217bb1c2c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-75a5-8404-60559925fb21" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7312-970b-af2217bb1c2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-7bb2-94ae-758ea8ec9e67" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7312-970b-af2217bb1c2c" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-7bb2-94ae-758ea8ec9e67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019e6b5e-ac9a-7856-bdca-339ec8d94452" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7e9b-ac18-de80ca0ad9c9" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019e6b5e-ac9a-7856-bdca-339ec8d94452" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-7856-bdca-339ec8d94452_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019e6b5e-ac9a-7856-bdca-339ec8d94452" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-7856-bdca-339ec8d94452_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-7cfa-b92b-f203018bd265" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis_019e6b5e-ac9a-7856-bdca-339ec8d94452" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-7cfa-b92b-f203018bd265" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019e6b5e-ac9a-76f0-bb88-6098e0a96b0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-7cfa-b92b-f203018bd265" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustMember_019e6b5e-ac9a-76f0-bb88-6098e0a96b0d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember_019e6b5e-ac9a-71a5-8849-30a48b4fc71e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustDomain_019e6b5e-ac9a-7cfa-b92b-f203018bd265" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember_019e6b5e-ac9a-71a5-8849-30a48b4fc71e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairAndContractValueAbstract_019e6b5e-ac9a-7196-bd14-10f3c7bac699" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairAndContractValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7694-9d42-c9d82ed6c453" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairAndContractValueAbstract_019e6b5e-ac9a-7196-bd14-10f3c7bac699" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue_019e6b5e-ac9a-7661-bd4b-ba99361931e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairAndContractValueAbstract_019e6b5e-ac9a-7196-bd14-10f3c7bac699" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue_019e6b5e-ac9a-7661-bd4b-ba99361931e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentContractValue_019e6b5e-ac9a-7269-bc6f-de530342b069" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentContractValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairAndContractValueAbstract_019e6b5e-ac9a-7196-bd14-10f3c7bac699" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentContractValue_019e6b5e-ac9a-7269-bc6f-de530342b069" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairAndContractValue_019e6b5e-ac9a-7b14-8192-f3f7608a2a8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairAndContractValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairAndContractValueAbstract_019e6b5e-ac9a-7196-bd14-10f3c7bac699" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairAndContractValue_019e6b5e-ac9a-7b14-8192-f3f7608a2a8a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/InterestInMasterTrustInvestmentIncomeDetails" xlink:type="simple" xlink:href="etr-20260624.xsd#InterestInMasterTrustInvestmentIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/InterestInMasterTrustInvestmentIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7eae-a60b-8939fb195d46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7c20-b4e9-c681abbe4fd7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7eae-a60b-8939fb195d46" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7c20-b4e9-c681abbe4fd7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7905-83be-91d987193aa8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustTable_019e6b5e-ac9a-7c20-b4e9-c681abbe4fd7" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7905-83be-91d987193aa8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7905-83be-91d987193aa8_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7905-83be-91d987193aa8" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7905-83be-91d987193aa8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9a-7ce5-86dd-f5ec134edebc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9a-7905-83be-91d987193aa8" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9a-7ce5-86dd-f5ec134edebc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9a-79e7-8c7e-ecec3ab59d78" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9a-7ce5-86dd-f5ec134edebc" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9a-79e7-8c7e-ecec3ab59d78" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForDividendIncomeOnInvestment_019e6b5e-ac9a-7b9c-b418-861747151943" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForDividendIncomeOnInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7eae-a60b-8939fb195d46" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForDividendIncomeOnInvestment_019e6b5e-ac9a-7b9c-b418-861747151943" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment_019e6b5e-ac9a-79ca-9d7a-e0a6efcdb9f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7eae-a60b-8939fb195d46" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment_019e6b5e-ac9a-79ca-9d7a-e0a6efcdb9f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment_019e6b5e-ac9a-7bc2-acf8-d8d682beea93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanMasterTrustLineItems_019e6b5e-ac9a-7eae-a60b-8939fb195d46" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment_019e6b5e-ac9a-7bc2-acf8-d8d682beea93" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/RelatedPartyTransactionsandExemptPartyInInterestTransactionsDetails" xlink:type="simple" xlink:href="etr-20260624.xsd#RelatedPartyTransactionsandExemptPartyInInterestTransactionsDetails"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/RelatedPartyTransactionsandExemptPartyInInterestTransactionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019e6b5e-ac9b-7902-9155-17572f70bf90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019e6b5e-ac9b-7eb2-9459-5595f420d7d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019e6b5e-ac9b-7902-9155-17572f70bf90" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019e6b5e-ac9b-7eb2-9459-5595f420d7d8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9b-7188-8610-172881d9344c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019e6b5e-ac9b-7eb2-9459-5595f420d7d8" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9b-7188-8610-172881d9344c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9b-7188-8610-172881d9344c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9b-7188-8610-172881d9344c" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9b-7188-8610-172881d9344c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9b-70f8-93c9-0fbffaf5d4c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e6b5e-ac9b-7188-8610-172881d9344c" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9b-70f8-93c9-0fbffaf5d4c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019e6b5e-ac9b-7ea0-845f-563fee38de81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e6b5e-ac9b-70f8-93c9-0fbffaf5d4c2" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019e6b5e-ac9b-7ea0-845f-563fee38de81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7177-a372-6fd2ad4f2724" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019e6b5e-ac9b-7eb2-9459-5595f420d7d8" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7177-a372-6fd2ad4f2724" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-7177-a372-6fd2ad4f2724_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7177-a372-6fd2ad4f2724" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-7177-a372-6fd2ad4f2724_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-79f1-9296-29c6b4894830" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7177-a372-6fd2ad4f2724" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-79f1-9296-29c6b4894830" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9b-7c7b-bd3a-1260295e40c7" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9b-79f1-9296-29c6b4894830" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9b-7c7b-bd3a-1260295e40c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPInvestmentYearEndMarketPricePerShare_019e6b5e-ac9b-7a65-a13b-77bb227e74e0" xlink:href="etr-20260624.xsd#etr_EBPInvestmentYearEndMarketPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019e6b5e-ac9b-7902-9155-17572f70bf90" xlink:to="loc_etr_EBPInvestmentYearEndMarketPricePerShare_019e6b5e-ac9b-7a65-a13b-77bb227e74e0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/ReconciliationtoForm5500Details" xlink:type="simple" xlink:href="etr-20260624.xsd#ReconciliationtoForm5500Details"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/ReconciliationtoForm5500Details" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-768a-a582-8a2270a3642f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-74c6-b3ba-b16b10393418" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-768a-a582-8a2270a3642f" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-74c6-b3ba-b16b10393418" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7664-84ca-4c04c07e4e55" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-74c6-b3ba-b16b10393418" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7664-84ca-4c04c07e4e55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-7664-84ca-4c04c07e4e55_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7664-84ca-4c04c07e4e55" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-7664-84ca-4c04c07e4e55_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-75ce-8a24-2e704492f0b6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7664-84ca-4c04c07e4e55" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-75ce-8a24-2e704492f0b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9b-798b-b7ce-6d59de275863" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9b-75ce-8a24-2e704492f0b6" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9b-798b-b7ce-6d59de275863" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantLiability_019e6b5e-ac9b-76ad-b62d-77dc9f470d2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanParticipantLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-768a-a582-8a2270a3642f" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantLiability_019e6b5e-ac9b-76ad-b62d-77dc9f470d2f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/ReconciliationtoForm5500ReconciliationofFinancialStatementsDetails" xlink:type="simple" xlink:href="etr-20260624.xsd#ReconciliationtoForm5500ReconciliationofFinancialStatementsDetails"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/ReconciliationtoForm5500ReconciliationofFinancialStatementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7098-8bb8-4342cd7e08d7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-7025-bb37-8fed9a6d5a25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7098-8bb8-4342cd7e08d7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-7025-bb37-8fed9a6d5a25" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7779-93a2-63d8cbb88033" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-7025-bb37-8fed9a6d5a25" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7779-93a2-63d8cbb88033" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-7779-93a2-63d8cbb88033_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7779-93a2-63d8cbb88033" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-7779-93a2-63d8cbb88033_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-7c82-a943-65813214584e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7779-93a2-63d8cbb88033" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-7c82-a943-65813214584e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9b-7f01-9b4d-1c7aefc1901d" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9b-7c82-a943-65813214584e" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9b-7f01-9b4d-1c7aefc1901d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019e6b5e-ac9b-72b7-8924-46f95159fd11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7098-8bb8-4342cd7e08d7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019e6b5e-ac9b-72b7-8924-46f95159fd11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitContractValueToCurrentValueAdjustment_019e6b5e-ac9b-77b2-a069-512e0352e1fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitContractValueToCurrentValueAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7098-8bb8-4342cd7e08d7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitContractValueToCurrentValueAdjustment_019e6b5e-ac9b-77b2-a069-512e0352e1fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution_019e6b5e-ac9b-7df0-8653-acecdde70cf7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7098-8bb8-4342cd7e08d7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution_019e6b5e-ac9b-7df0-8653-acecdde70cf7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionAsset_019e6b5e-ac9b-7134-ba0a-489d4a5490e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7098-8bb8-4342cd7e08d7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionAsset_019e6b5e-ac9b-7134-ba0a-489d4a5490e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitAllocationToWithdrawingParticipantNotYetPaid_019e6b5e-ac9b-7062-8c3f-abc56fc2e8c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitAllocationToWithdrawingParticipantNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7098-8bb8-4342cd7e08d7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitAllocationToWithdrawingParticipantNotYetPaid_019e6b5e-ac9b-7062-8c3f-abc56fc2e8c0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetAssetAvailableForBenefit_019e6b5e-ac9b-74f0-9dbd-ccc3111ac0f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetAssetAvailableForBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-7098-8bb8-4342cd7e08d7" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetAssetAvailableForBenefit_019e6b5e-ac9b-74f0-9dbd-ccc3111ac0f7" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/ReconciliationtoForm5500NetIncomeDetails" xlink:type="simple" xlink:href="etr-20260624.xsd#ReconciliationtoForm5500NetIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/ReconciliationtoForm5500NetIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-74aa-809d-c745ebcbaa2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-75c4-83a5-1bc8f2c37c11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-74aa-809d-c745ebcbaa2c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-75c4-83a5-1bc8f2c37c11" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9b-756f-939b-59cdb65bf28e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_019e6b5e-ac9b-75c4-83a5-1bc8f2c37c11" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9b-756f-939b-59cdb65bf28e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-756f-939b-59cdb65bf28e_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-756f-939b-59cdb65bf28e" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-756f-939b-59cdb65bf28e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-77e4-af7f-6aa5d2dde2ab" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-756f-939b-59cdb65bf28e" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-77e4-af7f-6aa5d2dde2ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9b-7bff-a11a-9eb51ec8f9bc" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9b-77e4-af7f-6aa5d2dde2ab" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9b-7bff-a11a-9eb51ec8f9bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease_019e6b5e-ac9b-7320-9c18-3ed3654c6b26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-74aa-809d-c745ebcbaa2c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease_019e6b5e-ac9b-7320-9c18-3ed3654c6b26" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPReconciliationToForm5500ChangeInNetAssetAvailableForBenefitPriorPeriodIncreaseFromContractValueToCurrentValue_019e6b5e-ac9b-7187-870c-7d0ed31052d2" xlink:href="etr-20260624.xsd#etr_EBPReconciliationToForm5500ChangeInNetAssetAvailableForBenefitPriorPeriodIncreaseFromContractValueToCurrentValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-74aa-809d-c745ebcbaa2c" xlink:to="loc_etr_EBPReconciliationToForm5500ChangeInNetAssetAvailableForBenefitPriorPeriodIncreaseFromContractValueToCurrentValue_019e6b5e-ac9b-7187-870c-7d0ed31052d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBPReconciliationToForm5500ChangeInNetAssetAvailableForBenefitCurrentPeriodDecreaseFromContractValueToCurrentValue_019e6b5e-ac9b-766a-a562-5c1b89dc0810" xlink:href="etr-20260624.xsd#etr_EBPReconciliationToForm5500ChangeInNetAssetAvailableForBenefitCurrentPeriodDecreaseFromContractValueToCurrentValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-74aa-809d-c745ebcbaa2c" xlink:to="loc_etr_EBPReconciliationToForm5500ChangeInNetAssetAvailableForBenefitCurrentPeriodDecreaseFromContractValueToCurrentValue_019e6b5e-ac9b-766a-a562-5c1b89dc0810" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500PaymentToParticipantDecreaseForAllocationToWithdrawingParticipantPaid_019e6b5e-ac9b-7277-b482-69d348a2ec22" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500PaymentToParticipantDecreaseForAllocationToWithdrawingParticipantPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-74aa-809d-c745ebcbaa2c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500PaymentToParticipantDecreaseForAllocationToWithdrawingParticipantPaid_019e6b5e-ac9b-7277-b482-69d348a2ec22" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500PaymentToParticipantIncreaseForAllocationToWithdrawingParticipantNotYetPaid_019e6b5e-ac9b-7877-a390-82a1b73e1b3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500PaymentToParticipantIncreaseForAllocationToWithdrawingParticipantNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-74aa-809d-c745ebcbaa2c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500PaymentToParticipantIncreaseForAllocationToWithdrawingParticipantNotYetPaid_019e6b5e-ac9b-7877-a390-82a1b73e1b3c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitIncreaseForDeemedDistributionPriorPeriod_019e6b5e-ac9b-77e7-b5d1-2b47efdee5dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitIncreaseForDeemedDistributionPriorPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-74aa-809d-c745ebcbaa2c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitIncreaseForDeemedDistributionPriorPeriod_019e6b5e-ac9b-77e7-b5d1-2b47efdee5dc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitDecreaseForDeemedDistributionCurrentPeriod_019e6b5e-ac9b-7d17-9533-fe4bc56ee298" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitDecreaseForDeemedDistributionCurrentPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-74aa-809d-c745ebcbaa2c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitDecreaseForDeemedDistributionCurrentPeriod_019e6b5e-ac9b-7d17-9533-fe4bc56ee298" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetIncomeLoss_019e6b5e-ac9b-7138-a944-44a99291611b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_019e6b5e-ac9b-74aa-809d-c745ebcbaa2c" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetIncomeLoss_019e6b5e-ac9b-7138-a944-44a99291611b" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.entergy.com/role/ScheduleofAssetsHeldatEndofYearDetails" xlink:type="simple" xlink:href="etr-20260624.xsd#ScheduleofAssetsHeldatEndofYearDetails"/>
  <link:definitionLink xlink:role="http://www.entergy.com/role/ScheduleofAssetsHeldatEndofYearDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019e6b5e-ac9b-7004-be52-4304ac6f3339" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019e6b5e-ac9b-74dc-9047-0f6818abc33c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019e6b5e-ac9b-7004-be52-4304ac6f3339" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019e6b5e-ac9b-74dc-9047-0f6818abc33c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7b6e-8492-8421c7005e9d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019e6b5e-ac9b-74dc-9047-0f6818abc33c" xlink:to="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7b6e-8492-8421c7005e9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-7b6e-8492-8421c7005e9d_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7b6e-8492-8421c7005e9d" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-7b6e-8492-8421c7005e9d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e6b5e-ac9b-77f8-84c9-f0b978f24b4a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e6b5e-ac9b-7b6e-8492-8421c7005e9d" xlink:to="loc_dei_EntityDomain_019e6b5e-ac9b-77f8-84c9-f0b978f24b4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_etr_EBP003Member_019e6b5e-ac9b-7263-bd8f-38bbebdb4a28" xlink:href="etr-20260624.xsd#etr_EBP003Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e6b5e-ac9b-77f8-84c9-f0b978f24b4a" xlink:to="loc_etr_EBP003Member_019e6b5e-ac9b-7263-bd8f-38bbebdb4a28" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e6b5e-ac9b-720f-8f59-13c03e65fab7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019e6b5e-ac9b-74dc-9047-0f6818abc33c" xlink:to="loc_srt_RangeAxis_019e6b5e-ac9b-720f-8f59-13c03e65fab7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e6b5e-ac9b-720f-8f59-13c03e65fab7_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e6b5e-ac9b-720f-8f59-13c03e65fab7" xlink:to="loc_srt_RangeMember_019e6b5e-ac9b-720f-8f59-13c03e65fab7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e6b5e-ac9b-7087-a7f8-3d766f61028a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e6b5e-ac9b-720f-8f59-13c03e65fab7" xlink:to="loc_srt_RangeMember_019e6b5e-ac9b-7087-a7f8-3d766f61028a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e6b5e-ac9b-729d-ac36-1898a6290af4" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e6b5e-ac9b-7087-a7f8-3d766f61028a" xlink:to="loc_srt_MinimumMember_019e6b5e-ac9b-729d-ac36-1898a6290af4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e6b5e-ac9b-79f8-a713-9b931dc1a232" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e6b5e-ac9b-7087-a7f8-3d766f61028a" xlink:to="loc_srt_MaximumMember_019e6b5e-ac9b-79f8-a713-9b931dc1a232" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e6b5e-ac9b-7b79-900a-2b867d54ba9a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019e6b5e-ac9b-7004-be52-4304ac6f3339" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e6b5e-ac9b-7b79-900a-2b867d54ba9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanPlanNumber_019e6b5e-ac9b-70e9-8e36-6aea066d709f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanPlanNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019e6b5e-ac9b-7004-be52-4304ac6f3339" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanPlanNumber_019e6b5e-ac9b-70e9-8e36-6aea066d709f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate_019e6b5e-ac9b-7491-a4a3-5c29c269bc4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019e6b5e-ac9b-7004-be52-4304ac6f3339" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate_019e6b5e-ac9b-7491-a4a3-5c29c269bc4b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution_019e6b5e-ac9b-753b-850e-58ef2988a37d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019e6b5e-ac9b-7004-be52-4304ac6f3339" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution_019e6b5e-ac9b-753b-850e-58ef2988a37d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution_019e6b5e-ac9b-70c0-9525-194fadb8efcb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019e6b5e-ac9b-7004-be52-4304ac6f3339" xlink:to="loc_us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution_019e6b5e-ac9b-70c0-9525-194fadb8efcb" xlink:type="arc" order="4"/>
  </link:definitionLink>
</link:linkbase>
