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[aw-then-ti-keyt] /ɔˈθɛn tɪˌkeɪt/
verb (used with object), authenticated, authenticating.
to establish as genuine.
to establish the authorship or origin of conclusively or unquestionably, chiefly by the techniques of scholarship:
to authenticate a painting.
to make authoritative or valid.
Origin of authenticate
1565-75; < Medieval Latin authenticātus made authentic (past participle of authenticāre). See authentic, -ate1
Related forms
authenticatable, adjective
authentication, noun
nonauthenticated, adjective
nonauthentication, noun
reauthenticate, verb (used with object), reauthenticated, reauthenticating.
reauthentication, noun
self-authenticating, adjective
unauthenticated, adjective
well-authenticated, adjective
1. confirm, validate, substantiate. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for authenticate
Contemporary Examples
Historical Examples
  • My very passport was gone, so that I had actually nothing to authenticate my position—not even my name.

  • Every king had his own seal, which was used to authenticate his public acts.

    Richard I Jacob Abbott
  • Not even miracles can authenticate a religion which preaches monasticism and celibacy.

  • I will begin with some anecdotes which I am myself able to authenticate.

    Stories of Animal Sagacity W.H.G. Kingston
  • As few could write, most people had to authenticate a document in some other way, for instance, by making their mark.

    The Common Law Oliver Wendell Holmes, Jr.
  • That is all very well; but how can you authenticate your claim to the property?

    The Honor of the Name Emile Gaboriau
British Dictionary definitions for authenticate


verb (transitive)
to establish as genuine or valid
to give authority or legal validity to
Derived Forms
authentication, noun
authenticator, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for authenticate

"verify, establish the credibility of," 1650s, from Medieval Latin authenticatus, past participle of authenticare, from authenticus (see authentic). Related: Authenticated; authenticating.

Online Etymology Dictionary, © 2010 Douglas Harper
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