con·​firm | \ kən-ˈfərm How to pronounce confirm (audio) \
confirmed; confirming; confirms

Definition of confirm

transitive verb

1 : to give approval to : ratify confirm a treaty
2 : to make firm or firmer : strengthen confirm one's resolve
3 : to administer the rite of confirmation to
4 : to give new assurance of the validity of : remove doubt about by authoritative act or indisputable fact confirm a rumor confirm an order

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Other Words from confirm

confirmability \ kən-​ˌfər-​mə-​ˈbi-​lə-​tē How to pronounce confirm (audio) \ noun
confirmable \ kən-​ˈfər-​mə-​bəl How to pronounce confirm (audio) \ adjective

Choose the Right Synonym for confirm

confirm, corroborate, substantiate, verify, authenticate, validate mean to attest to the truth or validity of something. confirm implies the removing of doubts by an authoritative statement or indisputable fact. confirmed the reports corroborate suggests the strengthening of what is already partly established. witnesses corroborated his story substantiate implies the offering of evidence that sustains the contention. the claims have yet to be substantiated verify implies the establishing of correspondence of actual facts or details with those proposed or guessed at. all statements of fact in the article have been verified authenticate implies establishing genuineness by adducing legal or official documents or expert opinion. handwriting experts authenticated the diaries validate implies establishing validity by authoritative affirmation or by factual proof. validated the hypothesis by experiments

Examples of confirm in a Sentence

The tests confirmed the doctors' suspicions of cancer. The attack confirmed her worst fears about the neighborhood. The award confirmed her status as one of the great movie actresses. The dentist's office called to confirm your appointment for tomorrow. We have a reservation for you for tomorrow night. Please call to confirm.
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Recent Examples on the Web These results confirm the inability of operators to properly deal with flaring. Ian Palmer, Forbes, "Methane Emissions Data: Regulations Needed To Stop Atmosphere Warming In Permian Basin.," 26 Feb. 2021 Israel has yet to publicly confirm that arrangement. Washington Post, "Israel doles out small batches of vaccines as diplomatic perks," 24 Feb. 2021 Their team had to confirm that their result wasn’t just some weird one-off. Max G. Levy, Wired, "Twinkling Black Holes Reveal an Invisible Cloud in Our Galaxy," 24 Feb. 2021 The Girls creator and actress, 34, listed her three-bedroom, three-bathroom compound in Los Angeles's Spaulding Square neighborhood earlier this week, PEOPLE can confirm. Hannah Chubb,, "Lena Dunham Lists 102-Year-Old L.A. Bungalow with Hollywood History for $2.8M — See Inside!," 24 Feb. 2021 In the 50-50 Senate, Democrats can confirm Becerra without Republican help, with Vice President Kamala Harris serving as the tiebreaking vote. Tal Kopan, San Francisco Chronicle, "Xavier Becerra to face Republican gantlet at confirmation hearings," 23 Feb. 2021 Her, a friend of the Lee family, owned the car involved in the crash, but investigators have yet to confirm who was driving, the Sheriff's Office said. Paul Walsh, Star Tribune, "2 brothers among 3 from St. Paul who died in fiery Chisago County collision," 17 Feb. 2021 And both spouses had yet to confirm or address the divorce news publicly. Bianca Betancourt, Harper's BAZAAR, "A Brief Guide to Kim Kardashian and Kanye West's Incomparable Romance," 6 Jan. 2021 The Utah Senate will have to confirm many of the 19 new appointees picked by Cox, who’s working to fill out his administration ahead of his Jan. 4 inauguration. The Salt Lake Tribune, "Gov.-elect Spencer Cox announces his picks for agriculture commissioner, top energy adviser," 21 Dec. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'confirm.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of confirm

13th century, in the meaning defined at sense 1

History and Etymology for confirm

Middle English, from Anglo-French cunfermer, from Latin confirmare, from com- + firmare to make firm, from firmus firm

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Time Traveler for confirm

Time Traveler

The first known use of confirm was in the 13th century

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Statistics for confirm

Last Updated

2 Mar 2021

Cite this Entry

“Confirm.” Dictionary, Merriam-Webster, Accessed 3 Mar. 2021.

Style: MLA
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More Definitions for confirm



English Language Learners Definition of confirm

: to state or show that (something) is true or correct
: to tell someone that something has definitely happened or is going to happen : to make (something) definite or official
formal : to make (something) stronger or more certain : to cause (someone) to believe (something) more strongly


con·​firm | \ kən-ˈfərm How to pronounce confirm (audio) \
confirmed; confirming

Kids Definition of confirm

1 : to make sure of the truth of Their arrest confirms my suspicion.
2 : to make firm or firmer (as in a habit, in faith, or in intention) : strengthen The job at the shelter confirmed her intention to become a veterinarian.
3 : approve sense 2, accept Senators confirmed the treaty.
4 : to perform a ceremony admitting a person into a church or synagogue


transitive verb

Legal Definition of confirm

1a : to make valid by necessary formal approval the debtor's chapter 13 plan 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 a consent decree confirming Capt. Brown's right to his cargo— W. G. Young

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