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substantiate

verb [T]
 
 
/səbˈstæn.ʃi.eɪt/ formal

Definition

to show something to be true, or to support a claim with facts: We have evidence to substantiate the allegations against him. Reports that children had been hurt have not been substantiated.Proving and disproving substantiation
 
 
/səbˌstæn.ʃiˈeɪ.ʃən/ noun [U] formal
The company produced receipts in substantiation of (= to support) its claim.Proving and disproving
(Definition of substantiate verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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