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Definitions for Confirm

[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.
[7] (may take a clause as object) to prove to be true or valid; corroborate; verify
[8] (may take a clause as object) to assert for a second or further time, so as to make more definite he confirmed that he would appear in court
[9] to strengthen or make more firm his story confirmed my doubts
[10] to make valid by a formal act or agreement; ratify
[11] to administer the rite of confirmation to

Words related to Confirm

certify, uphold, affirm, verify, explain, substantiate, back, sign, corroborate, establish, endorse, approve, support, assure, attest, buy, okay, debunk, underpin, bless

Words nearby Confirm

configure, confine, confined, confinee, confinement, confirm, confirmand, confirmation, confirmation bias, confirmation hearings, confirmatory

Origin of Confirm

1250–1300; < Latin confirmāre to strengthen, confirm (see con-, firm1); replacing Middle English confermen < Old French < Latin, as above

Other words from Confirm

con·firm·a·ble , adjective
con·firm·a·bil·i·ty , noun
con·firm·er ; Law . con·fir·mor [kon-fer-mawr , kuh n-fur -mer] /ˌkɒn fərˈmɔr, kənˈfɜr mər/ , noun
con·firm·ing·ly , adverb
non·con·firm·ing , adjective
pre·con·firm , verb (used with object)
re·con·firm , verb (used with object)
un·con·firm , verb (used with object)
un·con·firm·a·bil·i·ty , noun

Word origin for Confirm

C13: from Old French confermer, from Latin confirmāre, from firmus firm 1

Synonyms for Confirm

affirm, approve, back, certify, corroborate, endorse, establish, explain, sign, substantiate, support, uphold, verify, attest, authenticate, bless, buy, check, circumstantiate, debunk, double-check, justify, okay, sanction, settle, subscribe, underpin, vouch, warrant, witness, bear out, check out, give green light, give high sign, give stamp of approval, give the go-ahead, give the nod, lap up, make good, make sure, rubber-stamp, sign off on, size up, thumbs up