SUBSTANTIATE Definition Meaning - Merriam-Webster confirm, corroborate, substantiate, verify, authenticate, validate mean to attest to the truth or validity of something confirm implies the removing of doubts by an authoritative statement or indisputable fact corroborate suggests the strengthening of what is already partly established
substantiate verb - Definition, pictures, pronunciation and . . . substantiate something to provide information or evidence to prove that something is true The results of the tests substantiated his claims They made accusations which could not be substantiated Definition of substantiate verb in Oxford Advanced Learner's Dictionary