Synonyms

confirm

American

[kuhn-furm] / kənˈfɜrm /

verb (used with object)

to establish the truth, accuracy, validity, or genuineness of; corroborate; verify.

This report confirms my suspicions.

Synonyms:

validate, authenticate, substantiate, prove

Antonyms:

disprove
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.

Antonyms:

invalidate
to make firm or more firm; add strength to; settle or establish firmly.

Their support confirmed my determination to run for mayor.

Synonyms:

fix

Antonyms:

shake
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.

confirm British

/ kənˈfɜːm /

verb

(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

"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

Other Word Forms

confirmability noun
confirmable adjective
confirmatory adjective
confirmer noun
confirmingly adverb
nonconfirming adjective
preconfirm verb (used with object)
reconfirm verb (used with object)
unconfirm verb (used with object)
unconfirmability noun

Etymology

Origin of confirm

First recorded in 1250–1300; from Latin confirmāre “to strengthen, confirm” ( con-, firm ¹ ); replacing Middle English confermen, from Old French, from Latin, as above

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

And yes, before you go racing to Peacock to confirm, Alexander gave his father Stellan a big ol’ hug in the closing goodbyes.

From Los Angeles Times

But on Tuesday, Wrexham council confirmed that it had been advised by the Home Office that the property will not be used for this and the plans were scrapped.

From BBC

Wilson’s publicist, Mark Goldman, confirmed that he died from complications related to cancer.

From Los Angeles Times

The keys were taken to the last known address for Tyrone, confirming his identity, but a motive was still unclear.

From BBC

The Department of Public Health has confirmed the first measles case this year in Los Angeles County.

From Los Angeles Times

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023