Au*then"ti*cate (?), v. t. [imp. &
p. p. Authenticated (?); p. pr. & vb.
n. Authenticating (?).] [Cf. LL. authenticare.]
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.
2. To prove authentic; to determine as real and
true; as, to authenticate a portrait. Walpole.