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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cf630-b6eb-7b72-9986-b977a404f741,g:b5370eac-29db-4d55-b524-aeeeadfefae1-->
<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://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SeriesOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_S000088027Member_019cf684-da14-7bd3-bcef-75c610de3c9d" xlink:href="ck0001771146-20260428.xsd#ck0001771146_S000088027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain" xlink:to="loc_ck0001771146_S000088027Member_019cf684-da14-7bd3-bcef-75c610de3c9d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oef_ShareClassDomain" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_C000254055Member_019cf690-af41-73e7-b73e-34ab00385398" xlink:href="ck0001771146-20260428.xsd#ck0001771146_C000254055Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_ShareClassDomain" xlink:to="loc_ck0001771146_C000254055Member_019cf690-af41-73e7-b73e-34ab00385398" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#RiskOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oef_AllRisksMember" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ReinsuranceRelatedSecuritiesRisksMember_019cf70c-3d3d-78a3-b0c7-ca0acbc83845" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ReinsuranceRelatedSecuritiesRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ReinsuranceRelatedSecuritiesRisksMember_019cf70c-3d3d-78a3-b0c7-ca0acbc83845" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ReinsuranceRelatedSecuritiesRisksQuotaShareNotesExcessOfLossNotesAndILWNotesMember_019cf712-2a3f-7983-b31e-e8e270bdb8b4" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ReinsuranceRelatedSecuritiesRisksQuotaShareNotesExcessOfLossNotesAndILWNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ReinsuranceRelatedSecuritiesRisksQuotaShareNotesExcessOfLossNotesAndILWNotesMember_019cf712-2a3f-7983-b31e-e8e270bdb8b4" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ReinsuranceRelatedSecuritiesRisksEventLinkedBondsMember_019cf737-c995-7478-b904-9167dc353359" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ReinsuranceRelatedSecuritiesRisksEventLinkedBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ReinsuranceRelatedSecuritiesRisksEventLinkedBondsMember_019cf737-c995-7478-b904-9167dc353359" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ReinsuranceRelatedSecuritiesRisksMoralHazardRisksMember_019cf739-22f1-7084-9702-14f21597fdf1" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ReinsuranceRelatedSecuritiesRisksMoralHazardRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ReinsuranceRelatedSecuritiesRisksMoralHazardRisksMember_019cf739-22f1-7084-9702-14f21597fdf1" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_MarketRiskMember_019cf739-ba6a-78b4-a1a5-df0180e52271" xlink:href="ck0001771146-20260428.xsd#ck0001771146_MarketRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_MarketRiskMember_019cf739-ba6a-78b4-a1a5-df0180e52271" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_DebtSecuritiesRisksMember_019cf73c-a90e-7363-9984-7292e9359d9f" xlink:href="ck0001771146-20260428.xsd#ck0001771146_DebtSecuritiesRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_DebtSecuritiesRisksMember_019cf73c-a90e-7363-9984-7292e9359d9f" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_DebtSecuritiesRisksCreditRiskMember_019cf73d-9972-75dd-9897-85571ee31187" xlink:href="ck0001771146-20260428.xsd#ck0001771146_DebtSecuritiesRisksCreditRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_DebtSecuritiesRisksCreditRiskMember_019cf73d-9972-75dd-9897-85571ee31187" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_DebtSecuritiesRisksHighYieldBondRiskMember_019cf742-1c0d-7d68-bffe-1e478d795368" xlink:href="ck0001771146-20260428.xsd#ck0001771146_DebtSecuritiesRisksHighYieldBondRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_DebtSecuritiesRisksHighYieldBondRiskMember_019cf742-1c0d-7d68-bffe-1e478d795368" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_DebtSecuritiesRisksInterestRateRiskMember_019cf742-f648-7c3b-8b39-9a5bc2f9c352" xlink:href="ck0001771146-20260428.xsd#ck0001771146_DebtSecuritiesRisksInterestRateRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_DebtSecuritiesRisksInterestRateRiskMember_019cf742-f648-7c3b-8b39-9a5bc2f9c352" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_DebtSecuritiesRisksFloatingRateInstrumentRiskMember_019cf744-fecf-726e-818a-5da077937836" xlink:href="ck0001771146-20260428.xsd#ck0001771146_DebtSecuritiesRisksFloatingRateInstrumentRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_DebtSecuritiesRisksFloatingRateInstrumentRiskMember_019cf744-fecf-726e-818a-5da077937836" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_DebtSecuritiesRisksPrepaymentRiskMember_019cf745-7a1a-72ee-8cb1-ac868d96e456" xlink:href="ck0001771146-20260428.xsd#ck0001771146_DebtSecuritiesRisksPrepaymentRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_DebtSecuritiesRisksPrepaymentRiskMember_019cf745-7a1a-72ee-8cb1-ac868d96e456" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ClimateRiskMember_019cf748-373e-787c-9ccf-237af070a823" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ClimateRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ClimateRiskMember_019cf748-373e-787c-9ccf-237af070a823" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFRisksMember_019cf748-ab25-7b16-8b8b-465b2d428a11" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ETFRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFRisksMember_019cf748-ab25-7b16-8b8b-465b2d428a11" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember_019cf74e-123e-77c6-8ea3-c310251533f6" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember_019cf74e-123e-77c6-8ea3-c310251533f6" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFRisksCashRedemptionRiskMember_019cf750-7bc7-7817-a398-0849ec58ff17" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ETFRisksCashRedemptionRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFRisksCashRedemptionRiskMember_019cf750-7bc7-7817-a398-0849ec58ff17" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFRisksCostsOfBuyingOrSellingSharesMember_019cf751-3886-7718-bfa9-d8feecfd0268" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ETFRisksCostsOfBuyingOrSellingSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFRisksCostsOfBuyingOrSellingSharesMember_019cf751-3886-7718-bfa9-d8feecfd0268" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFRisksSharesMayTradeAtPricesOtherThanNAVMember_019cf751-a926-7335-8094-4ff846f07050" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ETFRisksSharesMayTradeAtPricesOtherThanNAVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFRisksSharesMayTradeAtPricesOtherThanNAVMember_019cf751-a926-7335-8094-4ff846f07050" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFRisksTradingMember_019cf752-3107-7c7b-901a-262eb6958ab6" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ETFRisksTradingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFRisksTradingMember_019cf752-3107-7c7b-901a-262eb6958ab6" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_SignificantExposureRiskMember_019cf754-472c-7204-a448-ef2dc731a41b" xlink:href="ck0001771146-20260428.xsd#ck0001771146_SignificantExposureRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_SignificantExposureRiskMember_019cf754-472c-7204-a448-ef2dc731a41b" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_FocusedInvestingRiskMember_019cf754-e8a5-7c23-89e0-19565c311381" xlink:href="ck0001771146-20260428.xsd#ck0001771146_FocusedInvestingRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_FocusedInvestingRiskMember_019cf754-e8a5-7c23-89e0-19565c311381" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ReinsuranceIndustryUnderperformanceRiskMember_019cf756-07ff-7059-9a67-1742d797c5e8" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ReinsuranceIndustryUnderperformanceRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ReinsuranceIndustryUnderperformanceRiskMember_019cf756-07ff-7059-9a67-1742d797c5e8" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_CurrencyRiskMember_019cf756-a31d-734b-88f1-f5e35bc32077" xlink:href="ck0001771146-20260428.xsd#ck0001771146_CurrencyRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_CurrencyRiskMember_019cf756-a31d-734b-88f1-f5e35bc32077" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_NonU.S.InvestmentRiskMember_019cf757-cd2c-78e3-b729-ddd346f205b1" xlink:href="ck0001771146-20260428.xsd#ck0001771146_NonU.S.InvestmentRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_NonU.S.InvestmentRiskMember_019cf757-cd2c-78e3-b729-ddd346f205b1" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_LiquidityRiskMember_019cf758-5a97-7dc2-8f36-a15ea33cd780" xlink:href="ck0001771146-20260428.xsd#ck0001771146_LiquidityRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_LiquidityRiskMember_019cf758-5a97-7dc2-8f36-a15ea33cd780" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ManagementRiskMember_019cf759-1ebf-784c-9a38-e8514e5fdd52" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ManagementRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ManagementRiskMember_019cf759-1ebf-784c-9a38-e8514e5fdd52" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ModelsAndDataRiskMember_019cf759-aa68-7de0-b240-f3492af054ef" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ModelsAndDataRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ModelsAndDataRiskMember_019cf759-aa68-7de0-b240-f3492af054ef" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_SpecialPurposeVehicleRisksMember_019cf75e-48d2-7d56-8a5e-cb1dd4a92ae3" xlink:href="ck0001771146-20260428.xsd#ck0001771146_SpecialPurposeVehicleRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_SpecialPurposeVehicleRisksMember_019cf75e-48d2-7d56-8a5e-cb1dd4a92ae3" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_SpecialPurposeVehicleRisksLackOfVotingRightsRiskMember_019cf75f-6476-7e22-9399-4969862463b4" xlink:href="ck0001771146-20260428.xsd#ck0001771146_SpecialPurposeVehicleRisksLackOfVotingRightsRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_SpecialPurposeVehicleRisksLackOfVotingRightsRiskMember_019cf75f-6476-7e22-9399-4969862463b4" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_SpecialPurposeVehicleRisksSubordinatedSecuritiesRiskMember_019cf761-2bb4-7194-8bee-8ba96db47e9f" xlink:href="ck0001771146-20260428.xsd#ck0001771146_SpecialPurposeVehicleRisksSubordinatedSecuritiesRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_SpecialPurposeVehicleRisksSubordinatedSecuritiesRiskMember_019cf761-2bb4-7194-8bee-8ba96db47e9f" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_SpecialPurposeVehicleRisksRiskOfNonQualificationAsAQualifiedInstitutionalBuyerMember_019cf762-fee1-7102-9618-b6541061826b" xlink:href="ck0001771146-20260428.xsd#ck0001771146_SpecialPurposeVehicleRisksRiskOfNonQualificationAsAQualifiedInstitutionalBuyerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_SpecialPurposeVehicleRisksRiskOfNonQualificationAsAQualifiedInstitutionalBuyerMember_019cf762-fee1-7102-9618-b6541061826b" xlink:type="arc" order="38"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ValuationRiskMember_019cf763-dea0-7e79-b8b6-7b178c7c5e2a" xlink:href="ck0001771146-20260428.xsd#ck0001771146_ValuationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ValuationRiskMember_019cf763-dea0-7e79-b8b6-7b178c7c5e2a" xlink:type="arc" order="39"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_VolatilityRiskMember_019cf764-883e-7dc6-b833-370a394916e7" xlink:href="ck0001771146-20260428.xsd#ck0001771146_VolatilityRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_VolatilityRiskMember_019cf764-883e-7dc6-b833-370a394916e7" xlink:type="arc" order="40"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_TaxAndRegulatedInvestmentCompanyQualificationRiskMember_019cf765-426a-77ae-adac-b24380491b66" xlink:href="ck0001771146-20260428.xsd#ck0001771146_TaxAndRegulatedInvestmentCompanyQualificationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_TaxAndRegulatedInvestmentCompanyQualificationRiskMember_019cf765-426a-77ae-adac-b24380491b66" xlink:type="arc" order="41"/>
  </link:definitionLink>
</link:linkbase>