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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 verify
  • But you should verify and validate the end products of their promises.
  • Field trials to verify the results of earlier lab and greenhouse studies have shown good results.
  • In both cases the researchers were able to verify mutation rates and relatedness measures.
  • Measure for equal diagonal dimensions to verify that the structure will be square.
  • He was under no professional sense of duty to look up and verify his references, and he regularly omitted to do it.
  • The key is to verify book ownership and to let the reader unlock other versions.
  • So being able to verify the accuracy and provenance of material is vital, he says.
  • On the one hand, there is the universe of news stories that you can hear and see, and information that you verify for yourself.
  • Any independent research firm worthy of the name should verify information coming from a hedge fund.
  • In any case, there are few ways to verify the claims of those who registered.
British Dictionary definitions for verify


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 verify

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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