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authenticate

[aw-then-ti-keyt] /ɔˈθɛn tɪˌkeɪt/
verb (used with object), authenticated, authenticating.
1.
to establish as genuine.
2.
to establish the authorship or origin of conclusively or unquestionably, chiefly by the techniques of scholarship:
to authenticate a painting.
3.
to make authoritative or valid.
Origin
1565-1575
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
Synonyms
1. confirm, validate, substantiate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for re-authenticate

authenticate

/ɔːˈθɛntɪˌkeɪt/
verb (transitive)
1.
to establish as genuine or valid
2.
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 re-authenticate

authenticate

v.

"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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