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certify

[sur-tuh-fahy] /ˈsɜr təˌfaɪ/
verb (used with object), certified, certifying.
1.
to attest as certain; give reliable information of; confirm:
He certified the truth of his claim.
2.
to testify to or vouch for in writing:
The medical examiner will certify his findings to the court.
3.
to guarantee; endorse reliably:
to certify a document with an official seal.
4.
to guarantee (a check) by writing on its face that the account against which it is drawn has sufficient funds to pay it.
5.
to award a certificate to (a person) attesting to the completion of a course of study or the passing of a qualifying examination.
6.
to declare legally insane and committable to a mental institution.
7.
Archaic. to assure or inform with certainty.
verb (used without object), certified, certifying.
8.
to give assurance; testify; vouch for the validity of something (usually followed by to).
Origin
1300-1350
1300-50; Middle English certifien < Middle French certifier < Late Latin certificāre, equivalent to Latin certi- (combining form of certus decided; see certain) + -ficāre -fy
Related forms
certifier, noun
precertify, verb (used with object), precertified, precertifying.
recertify, verb (used with object), recertified, recertifying.
uncertifying, adjective
Synonyms
1. corroborate, verify, validate, guarantee.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for recertify

certify

/ˈsɜːtɪˌfaɪ/
verb -fies, -fying, -fied
1.
to confirm or attest (to), usually in writing the letter certified her age
2.
(transitive) to endorse or guarantee (that certain required standards have been met)
3.
to give reliable information or assurances he certified that it was Walter's handwriting
4.
(transitive) to declare legally insane
5.
(transitive) (US & Canadian) (of a bank) to state in writing on (a cheque) that payment is guaranteed
Derived Forms
certifier, noun
Word Origin
C14: from Old French certifier, from Medieval Latin certificāre to make certain, from Latin certuscertain + 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 recertify
certify
early 14c., from O.Fr. certifier "make certain," from L.L. certificare, from L. certus (see certain) + root of facere "to make, do" (see factitious).
Online Etymology Dictionary, © 2010 Douglas Harper
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