Webster
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Webster’s Revised Unabridged Dictionary · 1913

Authenticate

Au·then′ti·cate (·tĭ·kāt), 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. Burke.

2. To prove authentic; to determine as real and true; as, to authenticate a portrait. Walpole.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty.