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confirm

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Confirmation
Confirmation Confirmation
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con⋅firm

  [kuhn-furm]
Use confirm in a Sentence
–verb (used with object)
1. to establish the truth, accuracy, validity, or genuineness of; corroborate; verify: This report confirms my suspicions.
2. to acknowledge with definite assurance: Did the hotel confirm our room reservation?
3. to make valid or binding by some formal or legal act; sanction; ratify: to confirm a treaty; to confirm her appointment to the Supreme Court.
4. to make firm or more firm; add strength to; settle or establish firmly: Their support confirmed my determination to run for mayor.
5. to strengthen (a person) in habit, resolution, opinion, etc.: The accident confirmed him in his fear of driving.
6. to administer the religious rite of confirmation to.
Origin:
1250–1300; < L confirmāre to strengthen, confirm (see con-, firm 1 ); r. ME confermen < OF < L, as above

Related forms:
con⋅firm⋅a⋅ble, adjective
con⋅firm⋅a⋅bil⋅i⋅ty, noun
con⋅firm⋅er; Law. con⋅fir⋅mor  [kon-fer-mawr, kuhn-fur-mer] , noun
con⋅firm⋅ing⋅ly, adverb

Synonyms:
1. prove, substantiate, authenticate, validate. 4. fix.

Antonyms:
1. disprove. 3. invalidate. 4. shake.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Confirmation
Confirmation Confirmation
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con·firm   (kən-fûrm')   
tr.v.   con·firmed, con·firm·ing, con·firms

  1. To support or establish the certainty or validity of; verify.

  2. To make firmer; strengthen: Working on the campaign confirmed her intention to go into politics.

  3. To make valid or binding by a formal or legal act; ratify.

  4. To administer the religious rite of confirmation to.


[Middle English confirmen, from Old French confermer, from Latin cōnfirmāre : com-, intensive pref.; see com- + firmāre, to strengthen (from firmus, strong; see dher- in Indo-European roots).]
con·firm'a·bil'i·ty n., con·firm'a·ble adj., con·firm'a·to'ry (-fûr'mə-tôr'ē, -tōr'ē) adj., con·firm'er n.
Synonyms: These verbs mean to affirm the truth, accuracy, or genuineness of something. Confirm implies removal of all doubt: "We must never make experiments to confirm our ideas, but simply to control them" (Claude Bernard).
Corroborate refers to supporting something by means of strengthening evidence: The witness is expected to corroborate the plaintiff's testimony.
To substantiate is to establish by presenting substantial or tangible evidence: "one of the most fully substantiated of historical facts" (James Harvey Robinson).
Authenticate implies the establishment of genuineness of something by the testimony of an expert: Never purchase an antique before it has been authenticated.
Validate refers to establishing the validity of something, such as a theory, claim, or judgment: The divorce validated my parents' original objection to the marriage.
Verify implies proving by comparison with an original or with established fact: The bank refused to cash the check until the signature was verified.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

confirm 
c.1290, from L. confirmare "make firm, strengthen, establish," from com- intensive prefix + firmare "to strengthen," from firmus (see firm (adj.)).
Online Etymology Dictionary, © 2001 Douglas Harper
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Legal Dictionary

Main Entry: con·firm
Function: transitive verb
1 a : to make valid by necessary formal approval confirmed by the court> b : to vote approval of <confirm a nomination>
2 : to give formal acknowledgment of receipt of
3 : to remove doubt about by authoritative act or indisputable fact confirming Capt. Brown's right to his cargo —W. G. Young>
Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.
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