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 The overall numbers confirm what demographers have long warned — that the country’s growth is stalling. Time, "New York and California Lose Congressional Seats, Texas and Florida Gain After 2020 Census," 27 Apr. 2021 The overall numbers confirm what demographers have long warned — that the country's growth is stalling. Star Tribune, "US marks slowest population growth since the Depression," 27 Apr. 2021 Monday’s figures otherwise confirm what Massachusetts officials expected for their state’s own political fate, despite a tumultuous counting process., "‘Good news for Massachusetts’: Population tops 7 million, as state keeps 9 congressional seats after 2020 Census," 26 Apr. 2021 Other photos from the concert confirm much of the same, as Machine Gun Kelly was seen reaching out touching fans’ hands. Troy L. Smith, cleveland, "Machine Gun Kelly plays full capacity show in Florida on eve of tour announcement," 26 Apr. 2021 While the final result is a surprise, if not a disappointment, the new numbers confirm that Arizona once again was among the nation's fastest-growing states. Ronald J. Hansen, The Arizona Republic, "Arizona population fails to grow fast enough to win a 10th House seat in Congress," 26 Apr. 2021 Margono did not confirm or comment on the fate of the crew members, and said rescuers are still working to locate and evacuate the crew trapped inside. Washington Post, "Indonesia finds items from missing submarine, indicating it has sunk," 24 Apr. 2021 Inspectors confirm the problem and route violations to city lawyers to file suit in Circuit Court. Cecilia Reyes,, "42 fires, 61 deaths: A story of failed city oversight," 23 Apr. 2021 Dallas did not provide badge numbers, so NBC News could not confirm whether any of the repeat shooters were different officers with the same name. NBC News, "Most officers never fire their guns. But some kill multiple people — and are still on the job.," 22 Apr. 2021

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

1 May 2021

Cite this Entry

“Confirm.” Dictionary, Merriam-Webster, Accessed 11 May. 2021.

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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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