confirm

[ kuhn-furm ]
/ kənˈfɜrm /

verb (used with object)

to establish the truth, accuracy, validity, or genuineness of; corroborate; verify: This report confirms my suspicions.
to acknowledge with definite assurance: Did the hotel confirm our room reservation?
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.
to make firm or more firm; add strength to; settle or establish firmly: Their support confirmed my determination to run for mayor.
to strengthen (a person) in habit, resolution, opinion, etc.: The accident confirmed him in his fear of driving.
to administer the religious rite of confirmation to.

Origin of confirm

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

SYNONYMS FOR confirm

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

ANTONYMS FOR confirm

1 disprove.
3 invalidate.
4 shake.

OTHER WORDS FROM confirm

Words nearby confirm

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

British Dictionary definitions for reconfirm (1 of 2)

reconfirm
/ (ˌriːkənˈfɜːm) /

verb (tr)

to confirm (an arrangement, agreement, etc) again reconfirm your return flight on arrival

British Dictionary definitions for reconfirm (2 of 2)

confirm
/ (kənˈfɜːm) /

verb (tr)

(may take a clause as object) to prove to be true or valid; corroborate; verify
(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
to strengthen or make more firm his story confirmed my doubts
to make valid by a formal act or agreement; ratify
to administer the rite of confirmation to

Derived forms of confirm

confirmable, adjective confirmatory or confirmative, adjective confirmer, noun

Word Origin for confirm

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