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Pronunciation:  o'thentu`keyt

WordNet Dictionary
[v]  establish the authenticity of something

AUTHENTICATE is a 12 letter word that starts with A.


 See Also: attest, certify, demonstrate, evidence, manifest, prove, verify



Webster's 1913 Dictionary
\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.                     --Burke.

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

Thesaurus Terms
 Related Terms: accept, accredit, affirm, amen, approve, attest, authorize, autograph, avouch, back, back up, bear out, bolster, buttress, certify, circumstantiate, confirm, corroborate, cosign, countersign, demonstrate, document, endorse, fortify, give permission, give the go-ahead, give the imprimatur, give thumbs up, initial, justify, notarize, OK, pass, pass on, pass upon, permit, probate, prove, ratify, reinforce, rubber stamp, sanction, say amen to, seal, second, sign, sign and seal, strengthen, subscribe to, substantiate, support, sustain, swear and affirm, swear to, test, try, undergird, undersign, underwrite, uphold, validate, verify, visa, vise, vouch for, warrant