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 two have all but confirmed their relationship, having been spotted meeting the Pope, vacationing in Japan, and dressing up like Donald Trump and Hilary Clinton together. Sam Tornow, Billboard, "Katy Perry and Orlando Bloom Step Out on London Date: See the New Photo," 13 July 2018 Tesla delivered its 200,000th vehicle this month, the company confirmed to Jalopnik, which means a slow phase-out of the tax credit has begun. Sean O'kane, The Verge, "Tesla will be the first automaker to lose the federal tax credit for electric cars," 12 July 2018 Richard Thigpen has been fired after more than two decades as general counsel of the Carolina Panthers, Thigpen confirmed to the Observer Thursday morning. Katherine Peralta And Joseph Person, charlotteobserver, "Longtime Carolina Panthers attorney fired," 12 July 2018 Once the guardian was confirmed to be family, children could be reunified. Sarah Gray, Fortune, "'Eligible' Children Under 5 Have Been Reunited With their Families, Trump Administration Says," 12 July 2018 In fact three confirmed subjects from the Neubauer study have committed suicide. J.r. Jones, Chicago Reader, "Triplets ripped from family in a Nazi-like experiment, probed in Three Identical Strangers," 5 July 2018 Inter have confirmed that Italy international Eder has completed a permanent move to Jiangsu Suning in China., "Inter Forward Eder Completes Permanent Move to Chinese Club Jiangsu Suning," 13 July 2018 The city has not confirmed who would enforce the scooter regulations. Faith E. Pinho, Indianapolis Star, "Indianapolis scooters: What the proposed regulations could mean," 13 July 2018 According to a city news release, all unions affiliated with the city have confirmed support of the proposal and each group will have the additional designated holiday included as part of their respective bargaining agreement. Steve Lord, Aurora Beacon-News, "Aurora may make Martin Luther King's birthday a holiday for city employees," 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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Phrases Related to confirm

confirmed bachelor

Statistics for confirm

Last Updated

10 Sep 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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Comments on confirm

What made you want to look up confirm? Please tell us where you read or heard it (including the quote, if possible).


alleviating pain or harshness

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