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English definition of “substantiate”

substantiate

verb [T]     /səbˈstæn.ʃi.eɪt/ formal
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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