con·​firm | \kən-ˈfərm \
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 \ noun
confirmable \ kən-​ˈfər-​mə-​bəl \ 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

The couple are engaged, the actress and singer’s rep Leslie Sloan confirms to PEOPLE. Sarah Michaud,, "Katharine McPhee and David Foster are engaged," 3 July 2018 And next time, assuming a Trump nominee gets confirmed to the Court, the decision will likely break the other way. Adam Harris, The Atlantic, "The Era of Affirmative Action May Not Last Much Longer," 3 July 2018 The Bucks didn’t rescind their $4.3 million qualifying offer to Jabari Parker before Friday’s late deadline, a source confirmed, which means the forward remains a restricted free agent. K.c. Johnson,, "Bulls working to sign restricted free agent Jabari Parker to offer sheet," 14 July 2018 This year, a survey of 209 high school students in Baltimore confirmed the prevalence of violence in their lives. Dan Rodricks,, "Where have you gone, Mister Rogers?," 13 July 2018 Charles Oakley was arrested at a Las Vegas casino for cheating, the Nevada Gaming Control Board confirmed in a statement to Sports Illustrated. Jenna West,, "Charles Oakley Arrested at Las Vegas Casino for Cheating," 12 July 2018 Still, Papa John's still has deals with the Kansas City Chiefs, the Dallas Cowboys and the Cleveland Browns, among other teams, their spokespeople confirmed. Kate Talerico, The Courier-Journal, "MLB suspends 'Papa Slam' promotion with Papa John's after racial slur," 12 July 2018 Perhaps coincidentally, James and writer Steve Mallory just sold the idea for an untitled comedy film to Paramount Players, USA TODAY Sports confirmed Wednesday, with James in early talks to star. Matt Eppers, USA TODAY, "LeBron James' agent Rich Paul calls move to LA Lakers 'a basketball decision'," 12 July 2018 The Phillies are looking for more offense from the left side of the infield, multiple major-league sources confirmed, and have been linked to the Royals’ Mike Moustakas, the Rangers’ Adrian Beltre and, of course, Machado, among others. Scott Lauber,, "Phillies' Maikel Franco making a play to stay | Extra Innings," 12 July 2018

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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Statistics for confirm

Last Updated

5 Nov 2018

Look-up Popularity

Time Traveler for confirm

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

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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

: to make (something) stronger or more certain : to cause (someone) to believe (something) more strongly


con·​firm | \kən-ˈfərm \
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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a private place of worship

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