AUTHENTICATE

authenticate. Authenticate, v.t. to establish by proof

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Au‐then″ti‐cate (�), v. t. [imp. & p. p. Authenticated (�); p. pr. & vb. n. Authenticating (�).] [[Cf. LL. authenticare.]] 1. 1. To render authentic; to give authority to, by the proof, attestation, or formalities required by law, or sufficient to entitle to credit.
The king serves only as a notary to authenticate the choice of judges. Burke. 2. 2. To prove authentic; to determine as real and true; as, to authenticate a portrait. Walpole.