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[ver-uh-fahy] /ˈvɛr əˌfaɪ/
verb (used with object), verified, verifying.
to prove the truth of, as by evidence or testimony; confirm; substantiate:
Events verified his prediction.
to ascertain the truth or correctness of, as by examination, research, or comparison:
to verify a spelling.
to act as ultimate proof or evidence of; serve to confirm.
  1. to prove or confirm (an allegation).
  2. to state to be true, especially in legal use, formally or upon oath.
Origin of verify
1275-1325; Middle English verifien < Middle French verifier < Medieval Latin vērificāre, equivalent to vēri-, combining form of vērus true + -ficāre -fy
Related forms
verifiability, verifiableness, noun
verifiable, adjective
verifier, noun
nonverifiable, adjective
preverify, verb (used with object), preverified, preverifying.
reverify, verb (used with object), reverified, reverifying.
unverifiability, noun
unverifiable, adjective
2. authenticate, validate. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for verifiable
  • He is not the only historically verifiable character.
  • My sources told me it's a trivial matter to make a verifiable voting system if you don't worry about privacy.
  • The long and short of it is that none of this is verifiable.
  • One can dispute the threshold chosen as abnormal, but the measurement is easily verifiable.
  • Any new information, such as the dismissal of charges or acquittal, must be verifiable.
  • The flip side of that is the question of whether any of these stories are going to be easily verifiable.
  • Once negotiations started, some of its doubts about the possibility of a useful and verifiable treaty might be dispelled.
  • However it is an actual budget with verifiable projection and it properly accounts for where money is coming from and going.
  • The payroll survey uses a bigger, more easily verifiable sample.
  • Such claims are not verifiable, but they are indicative of fears running high.
British Dictionary definitions for verifiable


verb (transitive) -fies, -fying, -fied
to prove to be true; confirm; substantiate
to check or determine the correctness or truth of by investigation, reference, etc
(law) to add a verification to (a pleading); substantiate or confirm (an oath)
Derived Forms
verifiable, adjective
verifiableness, noun
verifiably, adverb
verifier, noun
Word Origin
C14: from Old French verifier, from Medieval Latin vērificāre, from Latin vērus true + facere to make
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 verifiable



early 14c., from Old French verifier, from Medieval Latin verificare "make true," from Latin verus "true" (see very) + root of facere "to make" (see factitious).

Online Etymology Dictionary, © 2010 Douglas Harper
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