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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.
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 verifying
  • verifying the note's authenticity needn't give you any more information than is contained on the note itself.
  • They have few means of verifying what is offered by the traveler, who as a consequence is a kind of trustee of his truth.
  • The problem for newspapers is that verifying the truth isn't their comparative advantage.
  • Using the same data obtained, he wrote two papers, one verifying that the mainstream theory is verified.
  • The project included the complete process, from selecting and characterising the materials, to making and verifying the design.
  • Then they started commissioning the platform, verifying that all prime and redundant subsystems perform as expected.
  • But, remember, science is about verifying predictions.
  • Thank you for verifying that there are upper waters.
  • Considering how much a snake that big would have to eat on a daily basis, verifying its presence should be relatively easy.
  • The researchers acknowledge that there's no way of verifying the ages or information of the users.
British Dictionary definitions for verifying


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 verifying



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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