SEC Info  
    Home      Search      My Interests      Help      Sign In      Please Sign In

Eco Science Solutions, Inc. – ‘10-Q’ for 10/31/20 – ‘EX-101.DEF’

On:  Monday, 12/21/20, at 4:58pm ET   ·   For:  10/31/20   ·   Accession #:  1594062-20-130   ·   File #:  0-54803

Previous ‘10-Q’:  ‘10-Q’ on 9/22/20 for 7/31/20   ·   Next & Latest:  ‘10-Q’ on 12/8/23 for 10/31/23

Find Words in Filings emoji
 
  in    Show  and   Hints

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

12/21/20  Eco Science Solutions, Inc.       10-Q       10/31/20   62:3.3M                                   Ideal Connection, Inc/FA

Quarterly Report   —   Form 10-Q
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-Q        Quarterly Report                                    HTML    395K 
 2: EX-31.1     Certification -- §302 - SOA'02                      HTML     23K 
 3: EX-31.2     Certification -- §302 - SOA'02                      HTML     23K 
 4: EX-32.1     Certification -- §906 - SOA'02                      HTML     17K 
 5: EX-32.2     Certification -- §906 - SOA'02                      HTML     17K 
12: R1          Document and Entity Information                     HTML     48K 
13: R2          Consolidated Balance Sheets                         HTML     86K 
14: R3          Consolidated Balance Sheets (Parenthetical)         HTML     38K 
15: R4          Consolidated Statements of Operations (Unaudited)   HTML     74K 
16: R5          Statements of Stockholders Equity Deficit           HTML     45K 
                (Unaudited)                                                      
17: R6          Consolidated Statements of Cash Flows (Unaudited)   HTML     74K 
18: R7          Nature of Business and Continuance of Operations    HTML     32K 
19: R8          Summary of Significant Accounting Policies          HTML     32K 
20: R9          Property and Equipment                              HTML     23K 
21: R10         License and Master Marketing Agreement              HTML     21K 
22: R11         Prepaid Expenses                                    HTML     21K 
23: R12         Convertible Promisory Note Receivable               HTML     19K 
24: R13         Notes Payable                                       HTML     63K 
25: R14         Convertible Note Payable                            HTML     28K 
26: R15         Related Party Transactions                          HTML     56K 
27: R16         Capital Stock                                       HTML     21K 
28: R17         Commitments                                         HTML     32K 
29: R18         Contingencies                                       HTML     35K 
30: R19         Subsequent Events                                   HTML     22K 
31: R20         Summary of Significant Accounting Policies          HTML     57K 
                (Policies)                                                       
32: R21         Property and Equipment (Tables)                     HTML     22K 
33: R22         Prepaid Expenses (Tables)                           HTML     22K 
34: R23         Notes Payable (Tables)                              HTML     56K 
35: R24         Convertible Note Payable (Tables)                   HTML     26K 
36: R25         Related Party Transactions (Tables)                 HTML     39K 
37: R26         Nature of Business and Continuance of Operations    HTML     27K 
                (Details)                                                        
38: R27         Summary of Significant Accounting Policies          HTML     38K 
                (Details)                                                        
39: R28         Property and Equipment (Details)                    HTML     24K 
40: R29         Property and Equipment (Details Textual)            HTML     19K 
41: R30         License and Master Marketing Agreement (Details)    HTML     20K 
42: R31         Prepaid Expenses (Details)                          HTML     24K 
43: R32         Convertible Promisory Note Receivable (Details)     HTML     33K 
44: R33         Notes Payable (Details)                             HTML     26K 
45: R34         Notes Payable (Details 1)                           HTML     27K 
46: R35         Notes Payable (Details 2)                           HTML     26K 
47: R36         Notes Payable (Details Textual)                     HTML     56K 
48: R37         Convertible Note Payable (Details)                  HTML     23K 
49: R38         Convertible Note Payable (Details 1)                HTML     18K 
50: R39         Convertible Note Payable (Details Textual)          HTML     38K 
51: R40         Related Party Transactions (Details)                HTML     26K 
52: R41         Related Party Transactions (Details 1)              HTML     36K 
53: R42         Related Party Transactions (Details 2)              HTML     31K 
54: R43         Related Party Transactions (Details 3)              HTML     19K 
55: R44         Related Party Transactions (Details Textual)        HTML    122K 
56: R45         Capital Stock (Details)                             HTML     49K 
57: R46         Commitments (Details)                               HTML     66K 
58: R47         Contingencies (Details)                             HTML     50K 
59: R48         Subsequent Events (Details)                         HTML     37K 
61: XML         IDEA XML File -- Filing Summary                      XML    108K 
60: EXCEL       IDEA Workbook of Financial Reports                  XLSX     77K 
 6: EX-101.INS  XBRL Instance -- essi-20201031                       XML   1.03M 
 8: EX-101.CAL  XBRL Calculations -- essi-20201031_cal               XML    118K 
 9: EX-101.DEF  XBRL Definitions -- essi-20201031_def                XML    360K 
10: EX-101.LAB  XBRL Labels -- essi-20201031_lab                     XML    622K 
11: EX-101.PRE  XBRL Presentations -- essi-20201031_pre              XML    522K 
 7: EX-101.SCH  XBRL Schema -- essi-20201031                         XSD    146K 
62: ZIP         XBRL Zipped Folder -- 0001594062-20-000130-xbrl      Zip     93K 


‘EX-101.DEF’   —   XBRL Definitions — essi-20201031_def


This Exhibit is an XBRL XML File.


                                                                                                                                                                                
<?xml version="1.0" standalone="no" encoding="windows-1252"?>
<!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 5.4b -->
<!-- Field: Doc-Info; Name: VendorURI; Value: http://www.novaworks.co -->
<!-- Field: Doc-Info; Name: Source; Value: essi%2D20201031.xfr; Date: 2020%2D12%2D21T21:35:06Z -->
<!-- Field: Doc-Info; Name: Status; Value: 0x801F0000 -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/DocumentAndEntityInformation" xlink:href="essi-20201031.xsd#DocumentAndEntityInformation" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/ConsolidatedBalanceSheets" xlink:href="essi-20201031.xsd#ConsolidatedBalanceSheets" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/BalanceSheetsParenthetical" xlink:href="essi-20201031.xsd#BalanceSheetsParenthetical" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/StatementsOfOperationsUnaudited" xlink:href="essi-20201031.xsd#StatementsOfOperationsUnaudited" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/StatementsOfStockholdersEquityDeficit" xlink:href="essi-20201031.xsd#StatementsOfStockholdersEquityDeficit" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/ConsolidatedStatementsOfCashFlowsUnaudited" xlink:href="essi-20201031.xsd#ConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/DescriptionOfBusinessAndBasisOfPresentation" xlink:href="essi-20201031.xsd#DescriptionOfBusinessAndBasisOfPresentation" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="essi-20201031.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/PropertyAndEquipment" xlink:href="essi-20201031.xsd#PropertyAndEquipment" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/LicenseAndMasterMarketingAgreement" xlink:href="essi-20201031.xsd#LicenseAndMasterMarketingAgreement" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/PrepaidExpenses" xlink:href="essi-20201031.xsd#PrepaidExpenses" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/ConvertiblePromisoryNoteReceivable" xlink:href="essi-20201031.xsd#ConvertiblePromisoryNoteReceivable" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/NotesPayable" xlink:href="essi-20201031.xsd#NotesPayable" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/ConvertibleNotePayable" xlink:href="essi-20201031.xsd#ConvertibleNotePayable" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactions" xlink:href="essi-20201031.xsd#RelatedPartyTransactions" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/CapitalStock" xlink:href="essi-20201031.xsd#CapitalStock" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/Commitments" xlink:href="essi-20201031.xsd#Commitments" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/Contingencies" xlink:href="essi-20201031.xsd#Contingencies" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/SubsequentEvents" xlink:href="essi-20201031.xsd#SubsequentEvents" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="essi-20201031.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/PropertyAndEquipmentTables" xlink:href="essi-20201031.xsd#PropertyAndEquipmentTables" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/PrepaidExpensesTables" xlink:href="essi-20201031.xsd#PrepaidExpensesTables" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/NotesPayableTables" xlink:href="essi-20201031.xsd#NotesPayableTables" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/ConvertibleNotePayableTables" xlink:href="essi-20201031.xsd#ConvertibleNotePayableTables" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactionsTables" xlink:href="essi-20201031.xsd#RelatedPartyTransactionsTables" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/NatureOfBusinessAndContinuanceOfOperationsDetails" xlink:href="essi-20201031.xsd#NatureOfBusinessAndContinuanceOfOperationsDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/SummaryOfSignificantAccountingPoliciesDetails" xlink:href="essi-20201031.xsd#SummaryOfSignificantAccountingPoliciesDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/PropertyAndEquipmentDetails" xlink:href="essi-20201031.xsd#PropertyAndEquipmentDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/PropertyAndEquipmentDetailsTextual" xlink:href="essi-20201031.xsd#PropertyAndEquipmentDetailsTextual" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/LicenseAndMasterMarketingAgreementDetails" xlink:href="essi-20201031.xsd#LicenseAndMasterMarketingAgreementDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/PrepaidExpensesDetails" xlink:href="essi-20201031.xsd#PrepaidExpensesDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/ConvertiblePromisoryNoteReceivableDetails" xlink:href="essi-20201031.xsd#ConvertiblePromisoryNoteReceivableDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/NotesPayableDetails" xlink:href="essi-20201031.xsd#NotesPayableDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/NotesPayableDetails1" xlink:href="essi-20201031.xsd#NotesPayableDetails1" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/NotesPayableDetails2" xlink:href="essi-20201031.xsd#NotesPayableDetails2" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/NotesPayableAndConvertibleNoteDetailsTextual" xlink:href="essi-20201031.xsd#NotesPayableAndConvertibleNoteDetailsTextual" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/ConvertibleNotePayableDetails" xlink:href="essi-20201031.xsd#ConvertibleNotePayableDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/ConvertibleNotePayableDetails1" xlink:href="essi-20201031.xsd#ConvertibleNotePayableDetails1" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/ConvertibleNotePayableDetailsTextual" xlink:href="essi-20201031.xsd#ConvertibleNotePayableDetailsTextual" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactionsDetails" xlink:href="essi-20201031.xsd#RelatedPartyTransactionsDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/Relatedpartytransactionsdetails1" xlink:href="essi-20201031.xsd#Relatedpartytransactionsdetails1" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactionsDetails2" xlink:href="essi-20201031.xsd#RelatedPartyTransactionsDetails2" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactionsDetails3" xlink:href="essi-20201031.xsd#RelatedPartyTransactionsDetails3" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactionsDetailsTextual" xlink:href="essi-20201031.xsd#RelatedPartyTransactionsDetailsTextual" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/CapitalStockDetails" xlink:href="essi-20201031.xsd#CapitalStockDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/CommitmentsDetails" xlink:href="essi-20201031.xsd#CommitmentsDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/ContingenciesDetails" xlink:href="essi-20201031.xsd#ContingenciesDetails" xlink:type="simple"/>
<link:roleRef roleURI="http://ecosciencesolutionsinc.com/role/SubsequentEventsDetails" xlink:href="essi-20201031.xsd#SubsequentEventsDetails" xlink:type="simple"/>
<link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension"/>
<link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain"/>
<link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member"/>
<link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all"/>
<link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#notAll" arcroleURI="http://xbrl.org/int/dim/arcrole/notAll"/>
<link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/DocumentAndEntityInformation" xlink:title="00000001 - Document - Document and Entity Information"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/ConsolidatedBalanceSheets" xlink:title="00000002 - Statement - Consolidated Balance Sheets"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/BalanceSheetsParenthetical" xlink:title="00000003 - Statement - Consolidated Balance Sheets (Parenthetical)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/StatementsOfOperationsUnaudited" xlink:title="00000004 - Statement - Consolidated Statements of Operations (Unaudited)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/StatementsOfStockholdersEquityDeficit" xlink:title="00000005 - Statement - Statements of Stockholders Equity Deficit (Unaudited)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaapStatementLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaapStatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapStatementTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaapStatementEquityComponentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_us-gaapStatementEquityComponentsAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaapEquityComponentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapStatementEquityComponentsAxis" xlink:to="loc_us-gaapEquityComponentDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaapEquityComponentDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapStatementEquityComponentsAxis" xlink:to="loc_us-gaapEquityComponentDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaapPreferredStockMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapEquityComponentDomain" xlink:to="loc_us-gaapPreferredStockMember_0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaapCommonStockMember_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapEquityComponentDomain" xlink:to="loc_us-gaapCommonStockMember_10" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaapTreasuryStockMember_20"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapEquityComponentDomain" xlink:to="loc_us-gaapTreasuryStockMember_20" xlink:type="arc" order="21"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaapAdditionalPaidInCapitalMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapEquityComponentDomain" xlink:to="loc_us-gaapAdditionalPaidInCapitalMember_30" xlink:type="arc" order="31"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaapRetainedEarningsMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapEquityComponentDomain" xlink:to="loc_us-gaapRetainedEarningsMember_40" xlink:type="arc" order="41"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaapStockholdersEquity_70"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapStockholdersEquity_70" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaapSharesOutstanding_70"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapSharesOutstanding_70" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss_70"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapNetIncomeLoss_70" xlink:type="arc" order="4"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/ConsolidatedStatementsOfCashFlowsUnaudited" xlink:title="00000006 - Statement - Consolidated Statements of Cash Flows (Unaudited)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/DescriptionOfBusinessAndBasisOfPresentation" xlink:title="00000007 - Disclosure - Nature of Business and Continuance of Operations"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/SummaryOfSignificantAccountingPolicies" xlink:title="00000008 - Disclosure - Summary of Significant Accounting Policies"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/PropertyAndEquipment" xlink:title="00000009 - Disclosure - Property and Equipment"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/LicenseAndMasterMarketingAgreement" xlink:title="00000010 - Disclosure - License and Master Marketing Agreement"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/PrepaidExpenses" xlink:title="00000011 - Disclosure - Prepaid Expenses"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/ConvertiblePromisoryNoteReceivable" xlink:title="00000012 - Disclosure - Convertible Promisory Note Receivable"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/NotesPayable" xlink:title="00000013 - Disclosure - Notes Payable"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/ConvertibleNotePayable" xlink:title="00000014 - Disclosure - Convertible Note Payable"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactions" xlink:title="00000015 - Disclosure - Related Party Transactions"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/CapitalStock" xlink:title="00000016 - Disclosure - Capital Stock"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/Commitments" xlink:title="00000017 - Disclosure - Commitments"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/Contingencies" xlink:title="00000018 - Disclosure - Contingencies"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/SubsequentEvents" xlink:title="00000019 - Disclosure - Subsequent Events"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:title="00000020 - Disclosure - Summary of Significant Accounting Policies (Policies)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/PropertyAndEquipmentTables" xlink:title="00000021 - Disclosure - Property and Equipment (Tables)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/PrepaidExpensesTables" xlink:title="00000022 - Disclosure - Prepaid Expenses (Tables)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/NotesPayableTables" xlink:title="00000023 - Disclosure - Notes Payable (Tables)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/ConvertibleNotePayableTables" xlink:title="00000024 - Disclosure - Convertible Note Payable (Tables)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactionsTables" xlink:title="00000025 - Disclosure - Related Party Transactions (Tables)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/NatureOfBusinessAndContinuanceOfOperationsDetails" xlink:title="00000026 - Disclosure - Nature of Business and Continuance of Operations (Details)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaapStatementLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaapStatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapStatementTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaapStatementClassOfStockAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_us-gaapStatementClassOfStockAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaapClassOfStockDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapStatementClassOfStockAxis" xlink:to="loc_us-gaapClassOfStockDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaapClassOfStockDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapStatementClassOfStockAxis" xlink:to="loc_us-gaapClassOfStockDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SeriesAPreferredStockMember" xlink:label="loc_us-gaapSeriesAPreferredStockMember_20"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapClassOfStockDomain" xlink:to="loc_us-gaapSeriesAPreferredStockMember_20" xlink:type="arc" order="22"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualAxis" xlink:label="loc_srtTitleOfIndividualAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_srtTitleOfIndividualAxis" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srtTitleOfIndividualWithRelationshipToEntityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srtTitleOfIndividualAxis" xlink:to="loc_srtTitleOfIndividualWithRelationshipToEntityDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srtTitleOfIndividualWithRelationshipToEntityDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_srtTitleOfIndividualAxis" xlink:to="loc_srtTitleOfIndividualWithRelationshipToEntityDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_BoardOfDirectorsChairmanMember" xlink:label="loc_srtBoardOfDirectorsChairmanMember_20"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srtTitleOfIndividualWithRelationshipToEntityDomain" xlink:to="loc_srtBoardOfDirectorsChairmanMember_20" xlink:type="arc" order="21"/>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_deiLegalEntityAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_deiLegalEntityAxis" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain" xlink:label="loc_deiEntityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_deiLegalEntityAxis" xlink:to="loc_deiEntityDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain" xlink:label="loc_deiEntityDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_deiLegalEntityAxis" xlink:to="loc_deiEntityDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_SeparationDegreesOneIncMember" xlink:label="loc_essiSeparationDegreesOneIncMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_deiEntityDomain" xlink:to="loc_essiSeparationDegreesOneIncMember_30" xlink:type="arc" order="31"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaapPreferredStockSharesAuthorized_50"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapPreferredStockSharesAuthorized_50" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_WorkingCapitalDeficit" xlink:label="loc_essiWorkingCapitalDeficit_50"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_essiWorkingCapitalDeficit_50" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaapRetainedEarningsAccumulatedDeficit_50"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapRetainedEarningsAccumulatedDeficit_50" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/SummaryOfSignificantAccountingPoliciesDetails" xlink:title="00000027 - Disclosure - Summary of Significant Accounting Policies (Details)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaapPropertyPlantAndEquipmentLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaapScheduleOfPropertyPlantAndEquipmentTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapPropertyPlantAndEquipmentLineItems" xlink:to="loc_us-gaapScheduleOfPropertyPlantAndEquipmentTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis" xlink:label="loc_srtRangeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfPropertyPlantAndEquipmentTable" xlink:to="loc_srtRangeAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember" xlink:label="loc_srtRangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srtRangeAxis" xlink:to="loc_srtRangeMember" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember" xlink:label="loc_srtRangeMember_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_srtRangeAxis" xlink:to="loc_srtRangeMember_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember" xlink:label="loc_srtMinimumMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srtRangeMember" xlink:to="loc_srtMinimumMember_30" xlink:type="arc" order="31"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember" xlink:label="loc_srtMaximumMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srtRangeMember" xlink:to="loc_srtMaximumMember_40" xlink:type="arc" order="41"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_SummaryOfSignificantAccountingPoliciesTextualAbstract" xlink:label="loc_essiSummaryOfSignificantAccountingPoliciesTextualAbstract_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapPropertyPlantAndEquipmentLineItems" xlink:to="loc_essiSummaryOfSignificantAccountingPoliciesTextualAbstract_90" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaapPropertyPlantAndEquipmentUsefulLife_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiSummaryOfSignificantAccountingPoliciesTextualAbstract_90" xlink:to="loc_us-gaapPropertyPlantAndEquipmentUsefulLife_90" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill" xlink:label="loc_us-gaapImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiSummaryOfSignificantAccountingPoliciesTextualAbstract_90" xlink:to="loc_us-gaapImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_90" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MarketingAndAdvertisingExpense" xlink:label="loc_us-gaapMarketingAndAdvertisingExpense_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiSummaryOfSignificantAccountingPoliciesTextualAbstract_90" xlink:to="loc_us-gaapMarketingAndAdvertisingExpense_90" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaapRevenues_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiSummaryOfSignificantAccountingPoliciesTextualAbstract_90" xlink:to="loc_us-gaapRevenues_90" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RecognitionOfDeferredRevenue" xlink:label="loc_us-gaapRecognitionOfDeferredRevenue_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiSummaryOfSignificantAccountingPoliciesTextualAbstract_90" xlink:to="loc_us-gaapRecognitionOfDeferredRevenue_90" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRecognitionNewAccountingPronouncementTiming" xlink:label="loc_us-gaapRevenueRecognitionNewAccountingPronouncementTiming_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiSummaryOfSignificantAccountingPoliciesTextualAbstract_90" xlink:to="loc_us-gaapRevenueRecognitionNewAccountingPronouncementTiming_90" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountCurrent" xlink:label="loc_us-gaapDebtInstrumentUnamortizedDiscountCurrent_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiSummaryOfSignificantAccountingPoliciesTextualAbstract_90" xlink:to="loc_us-gaapDebtInstrumentUnamortizedDiscountCurrent_90" xlink:type="arc" order="7"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/PropertyAndEquipmentDetails" xlink:title="00000028 - Disclosure - Property and Equipment (Details)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/PropertyAndEquipmentDetailsTextual" xlink:title="00000029 - Disclosure - Property and Equipment (Details Textual)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/LicenseAndMasterMarketingAgreementDetails" xlink:title="00000030 - Disclosure - License and Master Marketing Agreement (Details)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaapStatementLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaapStatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapStatementTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_AllianceMember" xlink:label="loc_essiAllianceMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiAllianceMember_0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingAxis" xlink:label="loc_us-gaapVestingAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_us-gaapVestingAxis" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingDomain" xlink:label="loc_us-gaapVestingDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapVestingAxis" xlink:to="loc_us-gaapVestingDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VestingDomain" xlink:label="loc_us-gaapVestingDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapVestingAxis" xlink:to="loc_us-gaapVestingDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember" xlink:label="loc_us-gaapShareBasedCompensationAwardTrancheOneMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapVestingDomain" xlink:to="loc_us-gaapShareBasedCompensationAwardTrancheOneMember_0" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_LicenseAndMasterMarketingAgreementTextualAbstract" xlink:label="loc_essiLicenseAndMasterMarketingAgreementTextualAbstract_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_essiLicenseAndMasterMarketingAgreementTextualAbstract_30" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_OperationalExpensesAndBusinessDevelopment" xlink:label="loc_essiOperationalExpensesAndBusinessDevelopment_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiLicenseAndMasterMarketingAgreementTextualAbstract_30" xlink:to="loc_essiOperationalExpensesAndBusinessDevelopment_30" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/PrepaidExpensesDetails" xlink:title="00000031 - Disclosure - Prepaid Expenses (Details)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/ConvertiblePromisoryNoteReceivableDetails" xlink:title="00000032 - Disclosure - Convertible Promisory Note Receivable (Details)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="loc_us-gaapShortTermDebtLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="loc_us-gaapScheduleOfShortTermDebtTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapShortTermDebtLineItems" xlink:to="loc_us-gaapScheduleOfShortTermDebtTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualAxis" xlink:label="loc_srtTitleOfIndividualAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfShortTermDebtTable" xlink:to="loc_srtTitleOfIndividualAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srtTitleOfIndividualWithRelationshipToEntityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srtTitleOfIndividualAxis" xlink:to="loc_srtTitleOfIndividualWithRelationshipToEntityDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srtTitleOfIndividualWithRelationshipToEntityDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_srtTitleOfIndividualAxis" xlink:to="loc_srtTitleOfIndividualWithRelationshipToEntityDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_GaDuCorporationMember" xlink:label="loc_essiGaDuCorporationMember_50"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srtTitleOfIndividualWithRelationshipToEntityDomain" xlink:to="loc_essiGaDuCorporationMember_50" xlink:type="arc" order="51"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertiblePromisoryNoteReceivableTextualAbstract" xlink:label="loc_essiConvertiblePromisoryNoteReceivableTextualAbstract_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtLineItems" xlink:to="loc_essiConvertiblePromisoryNoteReceivableTextualAbstract_100" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaapDebtInstrumentFaceAmount_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertiblePromisoryNoteReceivableTextualAbstract_100" xlink:to="loc_us-gaapDebtInstrumentFaceAmount_100" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:label="loc_us-gaapIncreaseDecreaseInAccruedInterestReceivableNet_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertiblePromisoryNoteReceivableTextualAbstract_100" xlink:to="loc_us-gaapIncreaseDecreaseInAccruedInterestReceivableNet_100" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaapInterestIncomeExpenseNet_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertiblePromisoryNoteReceivableTextualAbstract_100" xlink:to="loc_us-gaapInterestIncomeExpenseNet_100" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaapDebtInstrumentMaturityDate_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertiblePromisoryNoteReceivableTextualAbstract_100" xlink:to="loc_us-gaapDebtInstrumentMaturityDate_100" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaapDebtInstrumentInterestRateStatedPercentage_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertiblePromisoryNoteReceivableTextualAbstract_100" xlink:to="loc_us-gaapDebtInstrumentInterestRateStatedPercentage_100" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateBasisForEffectiveRate" xlink:label="loc_us-gaapDebtInstrumentInterestRateBasisForEffectiveRate_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertiblePromisoryNoteReceivableTextualAbstract_100" xlink:to="loc_us-gaapDebtInstrumentInterestRateBasisForEffectiveRate_100" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestReceivableCurrent" xlink:label="loc_us-gaapInterestReceivableCurrent_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertiblePromisoryNoteReceivableTextualAbstract_100" xlink:to="loc_us-gaapInterestReceivableCurrent_100" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_InterestReceivableDescription" xlink:label="loc_essiInterestReceivableDescription_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertiblePromisoryNoteReceivableTextualAbstract_100" xlink:to="loc_essiInterestReceivableDescription_100" xlink:type="arc" order="8"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/NotesPayableDetails" xlink:title="00000033 - Disclosure - Notes Payable (Details)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/NotesPayableDetails1" xlink:title="00000034 - Disclosure - Notes Payable (Details 1)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaapStatementLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaapStatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapStatementTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaapShortTermDebtTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_us-gaapShortTermDebtTypeAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaapShortTermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapShortTermDebtTypeAxis" xlink:to="loc_us-gaapShortTermDebtTypeDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaapShortTermDebtTypeDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapShortTermDebtTypeAxis" xlink:to="loc_us-gaapShortTermDebtTypeDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConvertibleNotesPayableMember" xlink:label="loc_us-gaapConvertibleNotesPayableMember_20"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_us-gaapConvertibleNotesPayableMember_20" xlink:type="arc" order="21"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableOneMember" xlink:label="loc_essiConvertibleNotesPayableOneMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableOneMember_40" xlink:type="arc" order="41"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableTwoMember" xlink:label="loc_essiConvertibleNotesPayableTwoMember_60"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableTwoMember_60" xlink:type="arc" order="61"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableThreeMember" xlink:label="loc_essiConvertibleNotesPayableThreeMember_80"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableThreeMember_80" xlink:type="arc" order="81"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableFourMember" xlink:label="loc_essiConvertibleNotesPayableFourMember_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableFourMember_100" xlink:type="arc" order="101"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_InterestPayableNonCurrent" xlink:label="loc_essiInterestPayableNonCurrent_130"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_essiInterestPayableNonCurrent_130" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_LongTermNotesPayableNonCurrent" xlink:label="loc_essiLongTermNotesPayableNonCurrent_130"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_essiLongTermNotesPayableNonCurrent_130" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/NotesPayableDetails2" xlink:title="00000035 - Disclosure - Notes Payable (Details 2)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaapStatementLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaapStatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapStatementTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaapShortTermDebtTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_us-gaapShortTermDebtTypeAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaapShortTermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapShortTermDebtTypeAxis" xlink:to="loc_us-gaapShortTermDebtTypeDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaapShortTermDebtTypeDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapShortTermDebtTypeAxis" xlink:to="loc_us-gaapShortTermDebtTypeDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConvertibleNotesPayableMember" xlink:label="loc_us-gaapConvertibleNotesPayableMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_us-gaapConvertibleNotesPayableMember_40" xlink:type="arc" order="41"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableOneMember" xlink:label="loc_essiConvertibleNotesPayableOneMember_60"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableOneMember_60" xlink:type="arc" order="61"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableTwoMember" xlink:label="loc_essiConvertibleNotesPayableTwoMember_80"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableTwoMember_80" xlink:type="arc" order="81"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableThreeMember" xlink:label="loc_essiConvertibleNotesPayableThreeMember_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableThreeMember_100" xlink:type="arc" order="101"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableFourMember" xlink:label="loc_essiConvertibleNotesPayableFourMember_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableFourMember_120" xlink:type="arc" order="121"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestAndDebtExpense" xlink:label="loc_us-gaapInterestAndDebtExpense_250"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapInterestAndDebtExpense_250" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/NotesPayableAndConvertibleNoteDetailsTextual" xlink:title="00000036 - Disclosure - Notes Payable (Details Textual)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="loc_us-gaapShortTermDebtLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="loc_us-gaapScheduleOfShortTermDebtTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapShortTermDebtLineItems" xlink:to="loc_us-gaapScheduleOfShortTermDebtTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaapShortTermDebtTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfShortTermDebtTable" xlink:to="loc_us-gaapShortTermDebtTypeAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaapShortTermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapShortTermDebtTypeAxis" xlink:to="loc_us-gaapShortTermDebtTypeDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaapShortTermDebtTypeDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapShortTermDebtTypeAxis" xlink:to="loc_us-gaapShortTermDebtTypeDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableTwoMember" xlink:label="loc_essiConvertibleNotesPayableTwoMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableTwoMember_0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableFourMember" xlink:label="loc_essiConvertibleNotesPayableFourMember_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableFourMember_10" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConvertibleNotesPayableMember" xlink:label="loc_us-gaapConvertibleNotesPayableMember_20"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_us-gaapConvertibleNotesPayableMember_20" xlink:type="arc" order="21"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableThreeMember" xlink:label="loc_essiConvertibleNotesPayableThreeMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableThreeMember_30" xlink:type="arc" order="31"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotesPayableOneMember" xlink:label="loc_essiConvertibleNotesPayableOneMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtTypeDomain" xlink:to="loc_essiConvertibleNotesPayableOneMember_40" xlink:type="arc" order="41"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_NotesPayableAndConvertibleNoteTextualAbstract" xlink:label="loc_essiNotesPayableAndConvertibleNoteTextualAbstract_460"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShortTermDebtLineItems" xlink:to="loc_essiNotesPayableAndConvertibleNoteTextualAbstract_460" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DueFromRelatedParties" xlink:label="loc_us-gaapDueFromRelatedParties_460"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiNotesPayableAndConvertibleNoteTextualAbstract_460" xlink:to="loc_us-gaapDueFromRelatedParties_460" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentMaturityDateDescription" xlink:label="loc_us-gaapDebtInstrumentMaturityDateDescription_460"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiNotesPayableAndConvertibleNoteTextualAbstract_460" xlink:to="loc_us-gaapDebtInstrumentMaturityDateDescription_460" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_AccruedInterestExpense" xlink:label="loc_essiAccruedInterestExpense_460"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiNotesPayableAndConvertibleNoteTextualAbstract_460" xlink:to="loc_essiAccruedInterestExpense_460" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="loc_us-gaapInterestPayableCurrentAndNoncurrent_460"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiNotesPayableAndConvertibleNoteTextualAbstract_460" xlink:to="loc_us-gaapInterestPayableCurrentAndNoncurrent_460" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_AdditionalPurchaseAmount" xlink:label="loc_essiAdditionalPurchaseAmount_460"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiNotesPayableAndConvertibleNoteTextualAbstract_460" xlink:to="loc_essiAdditionalPurchaseAmount_460" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpenseDebt" xlink:label="loc_us-gaapInterestExpenseDebt_460"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiNotesPayableAndConvertibleNoteTextualAbstract_460" xlink:to="loc_us-gaapInterestExpenseDebt_460" xlink:type="arc" order="6"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/ConvertibleNotePayableDetails" xlink:title="00000037 - Disclosure - Convertible Note Payable (Details)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/ConvertibleNotePayableDetails1" xlink:title="00000038 - Disclosure - Convertible Note Payable (Details 1)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/ConvertibleNotePayableDetailsTextual" xlink:title="00000039 - Disclosure - Convertible Note Payable (Details Textual)">
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotePayableLineItems" xlink:label="loc_essiConvertibleNotePayableLineItems"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotePayableTable" xlink:label="loc_essiConvertibleNotePayableTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_essiConvertibleNotePayableLineItems" xlink:to="loc_essiConvertibleNotePayableTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_essiConvertibleNotePayableTable" xlink:to="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_LenderMember" xlink:label="loc_essiLenderMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiLenderMember_30" xlink:type="arc" order="31"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotePayableTextualAbstract" xlink:label="loc_essiConvertibleNotePayableTextualAbstract_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertibleNotePayableLineItems" xlink:to="loc_essiConvertibleNotePayableTextualAbstract_100" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleNotePayableDescription" xlink:label="loc_essiConvertibleNotePayableDescription_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertibleNotePayableTextualAbstract_100" xlink:to="loc_essiConvertibleNotePayableDescription_100" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConvertibleDebtAccruedInterest" xlink:label="loc_essiConvertibleDebtAccruedInterest_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertibleNotePayableTextualAbstract_100" xlink:to="loc_essiConvertibleDebtAccruedInterest_100" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_CommonStockDiscountPercentage" xlink:label="loc_essiCommonStockDiscountPercentage_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertibleNotePayableTextualAbstract_100" xlink:to="loc_essiCommonStockDiscountPercentage_100" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_FullPaymentOfUnpaidBalance" xlink:label="loc_essiFullPaymentOfUnpaidBalance_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertibleNotePayableTextualAbstract_100" xlink:to="loc_essiFullPaymentOfUnpaidBalance_100" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature" xlink:label="loc_us-gaapDebtInstrumentConvertibleBeneficialConversionFeature_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertibleNotePayableTextualAbstract_100" xlink:to="loc_us-gaapDebtInstrumentConvertibleBeneficialConversionFeature_100" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_AmortizationOfBeneficialConversionFeatureDiscount" xlink:label="loc_essiAmortizationOfBeneficialConversionFeatureDiscount_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertibleNotePayableTextualAbstract_100" xlink:to="loc_essiAmortizationOfBeneficialConversionFeatureDiscount_100" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_UnamortizedBalanceOfBeneficialConversionFeature" xlink:label="loc_essiUnamortizedBalanceOfBeneficialConversionFeature_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertibleNotePayableTextualAbstract_100" xlink:to="loc_essiUnamortizedBalanceOfBeneficialConversionFeature_100" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_AccruedInterestExpense" xlink:label="loc_essiAccruedInterestExpense_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertibleNotePayableTextualAbstract_100" xlink:to="loc_essiAccruedInterestExpense_100" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestPayableCurrent" xlink:label="loc_us-gaapInterestPayableCurrent_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiConvertibleNotePayableTextualAbstract_100" xlink:to="loc_us-gaapInterestPayableCurrent_100" xlink:type="arc" order="9"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactionsDetails" xlink:title="00000040 - Disclosure - Related Party Transactions (Details)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaapRelatedPartyTransactionLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionLineItems" xlink:to="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_RelatedPartyMember" xlink:label="loc_essiRelatedPartyMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiRelatedPartyMember_0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent" xlink:label="loc_us-gaapNotesPayableRelatedPartiesCurrentAndNoncurrent_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyTransactionLineItems" xlink:to="loc_us-gaapNotesPayableRelatedPartiesCurrentAndNoncurrent_30" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NotesPayable" xlink:label="loc_us-gaapNotesPayable_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyTransactionLineItems" xlink:to="loc_us-gaapNotesPayable_30" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DueToRelatedPartiesCurrentAndNoncurrent" xlink:label="loc_us-gaapDueToRelatedPartiesCurrentAndNoncurrent_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyTransactionLineItems" xlink:to="loc_us-gaapDueToRelatedPartiesCurrentAndNoncurrent_30" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/Relatedpartytransactionsdetails1" xlink:title="00000041 - Disclosure - Related Party Transactions (Details 1)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaapRelatedPartyTransactionLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionLineItems" xlink:to="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrMichaelRountreeMember" xlink:label="loc_essiMrMichaelRountreeMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrMichaelRountreeMember_0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrAndyTuckerMember" xlink:label="loc_essiMrAndyTuckerMember_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrAndyTuckerMember_10" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ChiefFinancialOfficerMember" xlink:label="loc_srtChiefFinancialOfficerMember_20"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_srtChiefFinancialOfficerMember_20" xlink:type="arc" order="21"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_SRandallOvesonMember" xlink:label="loc_essiSRandallOvesonMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiSRandallOvesonMember_30" xlink:type="arc" order="31"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember" xlink:label="loc_us-gaapImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_us-gaapImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_40" xlink:type="arc" order="41"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_LJohnLewisMember" xlink:label="loc_essiLJohnLewisMember_50"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiLJohnLewisMember_50" xlink:type="arc" order="51"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ChiefExecutiveOfficerMember" xlink:label="loc_srtChiefExecutiveOfficerMember_60"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_srtChiefExecutiveOfficerMember_60" xlink:type="arc" order="61"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ServicesProvidedFromRelatedParty" xlink:label="loc_essiServicesProvidedFromRelatedParty_330"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyTransactionLineItems" xlink:to="loc_essiServicesProvidedFromRelatedParty_330" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactionsDetails2" xlink:title="00000042 - Disclosure - Related Party Transactions (Details 2)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaapRelatedPartyTransactionLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionLineItems" xlink:to="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_Mr.LewisMember" xlink:label="loc_essiMr.LewisMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMr.LewisMember_0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ChiefExecutiveOfficerMember" xlink:label="loc_srtChiefExecutiveOfficerMember_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_srtChiefExecutiveOfficerMember_10" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrMichaelRountreeMember" xlink:label="loc_essiMrMichaelRountreeMember_20"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrMichaelRountreeMember_20" xlink:type="arc" order="21"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ChiefFinancialOfficerMember" xlink:label="loc_srtChiefFinancialOfficerMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_srtChiefFinancialOfficerMember_30" xlink:type="arc" order="31"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrLewisMember" xlink:label="loc_essiMrLewisMember_110"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrLewisMember_110" xlink:type="arc" order="111"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpenseRelatedParty" xlink:label="loc_us-gaapInterestExpenseRelatedParty_210"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyTransactionLineItems" xlink:to="loc_us-gaapInterestExpenseRelatedParty_210" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactionsDetails3" xlink:title="00000043 - Disclosure - Related Party Transactions (Details 3)"/>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/RelatedPartyTransactionsDetailsTextual" xlink:title="00000044 - Disclosure - Related Party Transactions (Details Textual)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaapRelatedPartyTransactionLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionLineItems" xlink:to="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ChiefFinancialOfficerMember" xlink:label="loc_srtChiefFinancialOfficerMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_srtChiefFinancialOfficerMember_0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ChiefExecutiveOfficerMember" xlink:label="loc_srtChiefExecutiveOfficerMember_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_srtChiefExecutiveOfficerMember_10" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_Mr.JefferyTaylorMember" xlink:label="loc_essiMr.JefferyTaylorMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMr.JefferyTaylorMember_40" xlink:type="arc" order="41"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrAndyTuckerMember" xlink:label="loc_essiMrAndyTuckerMember_50"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrAndyTuckerMember_50" xlink:type="arc" order="51"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_LJohnLewisMember" xlink:label="loc_essiLJohnLewisMember_60"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiLJohnLewisMember_60" xlink:type="arc" order="61"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrMichaelRountreeMember" xlink:label="loc_essiMrMichaelRountreeMember_70"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrMichaelRountreeMember_70" xlink:type="arc" order="71"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_SRandallOvesonMember" xlink:label="loc_essiSRandallOvesonMember_80"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiSRandallOvesonMember_80" xlink:type="arc" order="81"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_HaikuHoldingsLLCMember" xlink:label="loc_essiHaikuHoldingsLLCMember_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiHaikuHoldingsLLCMember_90" xlink:type="arc" order="91"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_RountreeConsultingIncMember" xlink:label="loc_essiRountreeConsultingIncMember_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiRountreeConsultingIncMember_150" xlink:type="arc" order="151"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember" xlink:label="loc_us-gaapImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_240"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_us-gaapImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_240" xlink:type="arc" order="241"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrDonLeeTaylorMember" xlink:label="loc_essiMrDonLeeTaylorMember_260"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrDonLeeTaylorMember_260" xlink:type="arc" order="261"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_Mr.LewisMember" xlink:label="loc_essiMr.LewisMember_270"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMr.LewisMember_270" xlink:type="arc" order="271"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrLewisMember" xlink:label="loc_essiMrLewisMember_430"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrLewisMember_430" xlink:type="arc" order="431"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_RelatedPartyTransactionsTextualAbstract" xlink:label="loc_essiRelatedPartyTransactionsTextualAbstract_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyTransactionLineItems" xlink:to="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DueToRelatedPartiesCurrent" xlink:label="loc_us-gaapDueToRelatedPartiesCurrent_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapDueToRelatedPartiesCurrent_590" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SalariesWagesAndOfficersCompensation" xlink:label="loc_us-gaapSalariesWagesAndOfficersCompensation_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapSalariesWagesAndOfficersCompensation_590" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaapDeferredFinanceCostsNet_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapDeferredFinanceCostsNet_590" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RepaymentsOfRelatedPartyDebt" xlink:label="loc_us-gaapRepaymentsOfRelatedPartyDebt_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapRepaymentsOfRelatedPartyDebt_590" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaapDebtInstrumentMaturityDate_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapDebtInstrumentMaturityDate_590" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepositLiabilitiesAccruedInterest" xlink:label="loc_us-gaapDepositLiabilitiesAccruedInterest_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapDepositLiabilitiesAccruedInterest_590" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_NumberOfMonthlyPayments" xlink:label="loc_essiNumberOfMonthlyPayments_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_essiNumberOfMonthlyPayments_590" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:label="loc_us-gaapRelatedPartyTransactionAmountsOfTransaction_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapRelatedPartyTransactionAmountsOfTransaction_590" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:label="loc_us-gaapRelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapRelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_590" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt" xlink:label="loc_us-gaapProceedsFromRepaymentsOfRelatedPartyDebt_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapProceedsFromRepaymentsOfRelatedPartyDebt_590" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_PercentageOfRelatedParty" xlink:label="loc_essiPercentageOfRelatedParty_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_essiPercentageOfRelatedParty_590" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentIncreaseAccruedInterest" xlink:label="loc_us-gaapDebtInstrumentIncreaseAccruedInterest_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapDebtInstrumentIncreaseAccruedInterest_590" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod" xlink:label="loc_us-gaapDebtInstrumentInterestRateDuringPeriod_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapDebtInstrumentInterestRateDuringPeriod_590" xlink:type="arc" order="13"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SalariesAndWages" xlink:label="loc_us-gaapSalariesAndWages_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_us-gaapSalariesAndWages_590" xlink:type="arc" order="14"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_AccruedSalaryPayable" xlink:label="loc_essiAccruedSalaryPayable_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_essiAccruedSalaryPayable_590" xlink:type="arc" order="15"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_AccumulatedPromissoryNotes" xlink:label="loc_essiAccumulatedPromissoryNotes_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_essiAccumulatedPromissoryNotes_590" xlink:type="arc" order="16"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_IntangibleAssetFee" xlink:label="loc_essiIntangibleAssetFee_590"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiRelatedPartyTransactionsTextualAbstract_590" xlink:to="loc_essiIntangibleAssetFee_590" xlink:type="arc" order="17"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/CapitalStockDetails" xlink:title="00000045 - Disclosure - Capital Stock (Details)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaapShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaapScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="loc_us-gaapScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaapAwardTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="loc_us-gaapAwardTypeAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaapShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapAwardTypeAxis" xlink:to="loc_us-gaapShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaapShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapAwardTypeAxis" xlink:to="loc_us-gaapShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_Mr.JefferyTaylorMember" xlink:label="loc_essiMr.JefferyTaylorMember_20"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMr.JefferyTaylorMember_20" xlink:type="arc" order="21"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_LJohnLewisMember" xlink:label="loc_essiLJohnLewisMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiLJohnLewisMember_30" xlink:type="arc" order="31"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrMichaelRountreeMember" xlink:label="loc_essiMrMichaelRountreeMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrMichaelRountreeMember_40" xlink:type="arc" order="41"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrDonLeeTaylorMember" xlink:label="loc_essiMrDonLeeTaylorMember_50"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrDonLeeTaylorMember_50" xlink:type="arc" order="51"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaapStatementClassOfStockAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="loc_us-gaapStatementClassOfStockAxis" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaapClassOfStockDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapStatementClassOfStockAxis" xlink:to="loc_us-gaapClassOfStockDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaapClassOfStockDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapStatementClassOfStockAxis" xlink:to="loc_us-gaapClassOfStockDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SeriesAPreferredStockMember" xlink:label="loc_us-gaapSeriesAPreferredStockMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapClassOfStockDomain" xlink:to="loc_us-gaapSeriesAPreferredStockMember_0" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualAxis" xlink:label="loc_srtTitleOfIndividualAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="loc_srtTitleOfIndividualAxis" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srtTitleOfIndividualWithRelationshipToEntityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srtTitleOfIndividualAxis" xlink:to="loc_srtTitleOfIndividualWithRelationshipToEntityDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srtTitleOfIndividualWithRelationshipToEntityDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_srtTitleOfIndividualAxis" xlink:to="loc_srtTitleOfIndividualWithRelationshipToEntityDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_BoardOfDirectorsChairmanMember" xlink:label="loc_srtBoardOfDirectorsChairmanMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srtTitleOfIndividualWithRelationshipToEntityDomain" xlink:to="loc_srtBoardOfDirectorsChairmanMember_0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_CapitalStockTextualAbstract" xlink:label="loc_essiCapitalStockTextualAbstract_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="loc_essiCapitalStockTextualAbstract_120" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaapCommonStockSharesIssued_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapCommonStockSharesIssued_120" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaapCommonStockSharesOutstanding_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapCommonStockSharesOutstanding_120" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaapCommonStockSharesAuthorized_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapCommonStockSharesAuthorized_120" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaapCommonStockParOrStatedValuePerShare_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapCommonStockParOrStatedValuePerShare_120" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentIncreaseAccruedInterest" xlink:label="loc_us-gaapDebtInstrumentIncreaseAccruedInterest_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapDebtInstrumentIncreaseAccruedInterest_120" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross" xlink:label="loc_us-gaapStockIssuedDuringPeriodSharesRestrictedStockAwardGross_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapStockIssuedDuringPeriodSharesRestrictedStockAwardGross_120" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross" xlink:label="loc_us-gaapStockIssuedDuringPeriodValueRestrictedStockAwardGross_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapStockIssuedDuringPeriodValueRestrictedStockAwardGross_120" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharesIssuedPricePerShare" xlink:label="loc_us-gaapSharesIssuedPricePerShare_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapSharesIssuedPricePerShare_120" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesHeldInEmployeeTrustShares" xlink:label="loc_us-gaapCommonStockSharesHeldInEmployeeTrustShares_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapCommonStockSharesHeldInEmployeeTrustShares_120" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaapPreferredStockSharesAuthorized_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapPreferredStockSharesAuthorized_120" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockVotingRights" xlink:label="loc_us-gaapPreferredStockVotingRights_120"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCapitalStockTextualAbstract_120" xlink:to="loc_us-gaapPreferredStockVotingRights_120" xlink:type="arc" order="11"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/CommitmentsDetails" xlink:title="00000046 - Disclosure - Commitments (Details)">
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_CommitmentsLineItems" xlink:label="loc_essiCommitmentsLineItems"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_CommitmentsTable" xlink:label="loc_essiCommitmentsTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_essiCommitmentsLineItems" xlink:to="loc_essiCommitmentsTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_essiCommitmentsTable" xlink:to="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_TakeTwoLMember" xlink:label="loc_essiTakeTwoLMember_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiTakeTwoLMember_10" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_ConsultantMember" xlink:label="loc_essiConsultantMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiConsultantMember_30" xlink:type="arc" order="31"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualAxis" xlink:label="loc_srtTitleOfIndividualAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_essiCommitmentsTable" xlink:to="loc_srtTitleOfIndividualAxis" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srtTitleOfIndividualWithRelationshipToEntityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srtTitleOfIndividualAxis" xlink:to="loc_srtTitleOfIndividualWithRelationshipToEntityDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srtTitleOfIndividualWithRelationshipToEntityDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_srtTitleOfIndividualAxis" xlink:to="loc_srtTitleOfIndividualWithRelationshipToEntityDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrStephenMarleyMember" xlink:label="loc_essiMrStephenMarleyMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srtTitleOfIndividualWithRelationshipToEntityDomain" xlink:to="loc_essiMrStephenMarleyMember_40" xlink:type="arc" order="41"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MsMaguireMember" xlink:label="loc_essiMsMaguireMember_60"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srtTitleOfIndividualWithRelationshipToEntityDomain" xlink:to="loc_essiMsMaguireMember_60" xlink:type="arc" order="61"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrJonesMember" xlink:label="loc_essiMrJonesMember_80"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srtTitleOfIndividualWithRelationshipToEntityDomain" xlink:to="loc_essiMrJonesMember_80" xlink:type="arc" order="81"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_CommitmentsTextualAbstract" xlink:label="loc_essiCommitmentsTextualAbstract_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsLineItems" xlink:to="loc_essiCommitmentsTextualAbstract_150" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_LesseeLeasingArrangementsOperatingLeasesTermsOfContract" xlink:label="loc_essiLesseeLeasingArrangementsOperatingLeasesTermsOfContract_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_essiLesseeLeasingArrangementsOperatingLeasesTermsOfContract_150" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasesRentExpenseMinimumRentals" xlink:label="loc_us-gaapOperatingLeasesRentExpenseMinimumRentals_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_us-gaapOperatingLeasesRentExpenseMinimumRentals_150" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredCostsLeasingNetCurrent" xlink:label="loc_us-gaapDeferredCostsLeasingNetCurrent_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_us-gaapDeferredCostsLeasingNetCurrent_150" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecurityDeposit" xlink:label="loc_us-gaapSecurityDeposit_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_us-gaapSecurityDeposit_150" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasesRentExpenseSubleaseRentals1" xlink:label="loc_us-gaapOperatingLeasesRentExpenseSubleaseRentals1_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_us-gaapOperatingLeasesRentExpenseSubleaseRentals1_150" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesPurchaseOfAssets" xlink:label="loc_us-gaapStockIssuedDuringPeriodSharesPurchaseOfAssets_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_us-gaapStockIssuedDuringPeriodSharesPurchaseOfAssets_150" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaapEquityMethodInvestmentOwnershipPercentage_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_us-gaapEquityMethodInvestmentOwnershipPercentage_150" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_EquityMethodInvestmentOwnershipAdditionPercentage" xlink:label="loc_essiEquityMethodInvestmentOwnershipAdditionPercentage_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_essiEquityMethodInvestmentOwnershipAdditionPercentage_150" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherCommitmentsDescription" xlink:label="loc_us-gaapOtherCommitmentsDescription_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_us-gaapOtherCommitmentsDescription_150" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DueToAffiliateCurrent" xlink:label="loc_us-gaapDueToAffiliateCurrent_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_us-gaapDueToAffiliateCurrent_150" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_CompensationAmountOnAgreement" xlink:label="loc_essiCompensationAmountOnAgreement_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_essiCompensationAmountOnAgreement_150" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross" xlink:label="loc_us-gaapStockIssuedDuringPeriodSharesRestrictedStockAwardGross_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_us-gaapStockIssuedDuringPeriodSharesRestrictedStockAwardGross_150" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToDevelopSoftware" xlink:label="loc_us-gaapPaymentsToDevelopSoftware_150"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_essiCommitmentsTextualAbstract_150" xlink:to="loc_us-gaapPaymentsToDevelopSoftware_150" xlink:type="arc" order="13"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/ContingenciesDetails" xlink:title="00000047 - Disclosure - Contingencies (Details)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaapStatementLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaapStatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapStatementTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaapSubsequentEventTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_us-gaapSubsequentEventTypeAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaapSubsequentEventTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapSubsequentEventTypeAxis" xlink:to="loc_us-gaapSubsequentEventTypeDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaapSubsequentEventTypeDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapSubsequentEventTypeAxis" xlink:to="loc_us-gaapSubsequentEventTypeDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaapSubsequentEventMember_20"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapSubsequentEventTypeDomain" xlink:to="loc_us-gaapSubsequentEventMember_20" xlink:type="arc" order="21"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_GannonGiguiereMember" xlink:label="loc_essiGannonGiguiereMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiGannonGiguiereMember_30" xlink:type="arc" order="32"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_Mr.JefferyTaylorMember" xlink:label="loc_essiMr.JefferyTaylorMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMr.JefferyTaylorMember_40" xlink:type="arc" order="42"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrDonLeeTaylorMember" xlink:label="loc_essiMrDonLeeTaylorMember_50"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrDonLeeTaylorMember_50" xlink:type="arc" order="52"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrLewisMember" xlink:label="loc_essiMrLewisMember_60"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrLewisMember_60" xlink:type="arc" order="62"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_SRandallOvesonMember" xlink:label="loc_essiSRandallOvesonMember_70"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiSRandallOvesonMember_70" xlink:type="arc" order="72"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_RobbinsLlpMember" xlink:label="loc_essiRobbinsLlpMember_80"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiRobbinsLlpMember_80" xlink:type="arc" order="82"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_PhenixVenturesLlcMember" xlink:label="loc_essiPhenixVenturesLlcMember_100"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiPhenixVenturesLlcMember_100" xlink:type="arc" order="102"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LossContingencyDamagesAwardedValue" xlink:label="loc_us-gaapLossContingencyDamagesAwardedValue_130"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapLossContingencyDamagesAwardedValue_130" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LitigationSettlementExpense" xlink:label="loc_us-gaapLitigationSettlementExpense_130"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapLitigationSettlementExpense_130" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_NetContingencyLiability" xlink:label="loc_essiNetContingencyLiability_130"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_essiNetContingencyLiability_130" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued" xlink:label="loc_us-gaapStockIssuedDuringPeriodSharesTreasuryStockReissued_130"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapStockIssuedDuringPeriodSharesTreasuryStockReissued_130" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings" xlink:label="loc_us-gaapRestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_130"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapRestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_130" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaapShortTermBorrowings_130"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapShortTermBorrowings_130" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaapDebtInstrumentInterestRateStatedPercentage_130"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapDebtInstrumentInterestRateStatedPercentage_130" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTerm" xlink:label="loc_us-gaapDebtInstrumentTerm_130"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapDebtInstrumentTerm_130" xlink:type="arc" order="7"/>
</link:definitionLink>
<link:definitionLink xlink:type="extended" xlink:role="http://ecosciencesolutionsinc.com/role/SubsequentEventsDetails" xlink:title="00000048 - Disclosure - Subsequent Events (Details)">
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaapStatementLineItems"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaapStatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xbrldt:contextElement="segment" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapStatementTable" xlink:type="arc" order="10" xbrldt:closed="true"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaapSubsequentEventTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_us-gaapSubsequentEventTypeAxis" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaapSubsequentEventTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapSubsequentEventTypeAxis" xlink:to="loc_us-gaapSubsequentEventTypeDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaapSubsequentEventTypeDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapSubsequentEventTypeAxis" xlink:to="loc_us-gaapSubsequentEventTypeDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaapSubsequentEventMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapSubsequentEventTypeDomain" xlink:to="loc_us-gaapSubsequentEventMember_0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaapStatementTable" xlink:to="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaapRelatedPartyDomain_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xbrldt:contextElement="segment" xlink:from="loc_us-gaapRelatedPartyTransactionsByRelatedPartyAxis" xlink:to="loc_us-gaapRelatedPartyDomain_10" xlink:type="arc" order="30"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_GannonGiguiereMember" xlink:label="loc_essiGannonGiguiereMember_0"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiGannonGiguiereMember_0" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_Mr.JefferyTaylorMember" xlink:label="loc_essiMr.JefferyTaylorMember_10"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMr.JefferyTaylorMember_10" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrDonLeeTaylorMember" xlink:label="loc_essiMrDonLeeTaylorMember_20"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrDonLeeTaylorMember_20" xlink:type="arc" order="22"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_MrLewisMember" xlink:label="loc_essiMrLewisMember_30"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiMrLewisMember_30" xlink:type="arc" order="32"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_SRandallOvesonMember" xlink:label="loc_essiSRandallOvesonMember_40"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiSRandallOvesonMember_40" xlink:type="arc" order="42"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_RobbinsLlpMember" xlink:label="loc_essiRobbinsLlpMember_50"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiRobbinsLlpMember_50" xlink:type="arc" order="52"/>
<link:loc xlink:type="locator" xlink:href="essi-20201031.xsd#essi_PhenixVenturesLlcMember" xlink:label="loc_essiPhenixVenturesLlcMember_60"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapRelatedPartyDomain" xlink:to="loc_essiPhenixVenturesLlcMember_60" xlink:type="arc" order="62"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued" xlink:label="loc_us-gaapStockIssuedDuringPeriodSharesTreasuryStockReissued_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapStockIssuedDuringPeriodSharesTreasuryStockReissued_90" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaapShortTermBorrowings_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapShortTermBorrowings_90" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings" xlink:label="loc_us-gaapRestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_90"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaapStatementLineItems" xlink:to="loc_us-gaapRestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_90" xlink:type="arc" order="2"/>
</link:definitionLink>
</link:linkbase>

Top
Filing Submission 0001594062-20-000130   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

Copyright © 2024 Fran Finnegan & Company LLC – All Rights Reserved.
AboutPrivacyRedactionsHelp — Wed., May 15, 1:00:26.1am ET