au·​then·​ti·​cate | \ ə-ˈthen-ti-ˌkāt How to pronounce authenticate (audio) , ȯ- \
authenticated; authenticating

Definition of authenticate

transitive verb

: to prove or serve to prove to be real, true, or genuine authenticate a document

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Other Words from authenticate

authenticator \ ə-​ˈthen-​ti-​ˌkā-​tər How to pronounce authenticator (audio) , ȯ-​ \ noun

Choose the Right Synonym for authenticate

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 authenticate in a Sentence

The signature has been authenticated. a jeweler authenticated the diamond as real
Recent Examples on the Web Its key feature is Face ID, which scans the user’s face to authenticate them before unlocking access to personalized files and services on the device. Samuel Axon, Ars Technica, "Apple plans to add a rear-facing 3D sensor to a new iPhone," 12 Mar. 2020 The famous signature was authenticated by Beckett Authentication Services. Bisma Parvez, Detroit Free Press, "Available to highest bidder: Articles of impeachment, complete with Donald Trump signature," 27 Jan. 2020 The source of the tweet has not been authenticated by NBC News. NBC News, "Muslim groups denounce Trump retweet of fake Pelosi-Schumer photo," 13 Jan. 2020 Carlson said a historical pathologist authenticated the frayed rope that is slated to be secured in an acid-free box. Vincent T. Davis,, "San Antonio residents seek roots at Spanish Archives, glimpse of early Hispanic history," 15 Oct. 2019 In 2017, Twitter paused its blue checkmark verifications after critics attacked the company for authenticating an account belonging to a man who organized a white nationalist rally in Charlottesville, Virginia. Kaya Yurieff, CNN, "YouTube is taking away some verified checkmarks. Creators aren't happy," 20 Sep. 2019 Typically, resources on a Windows network will accept the Net-NTLM-v2 hash when authenticating a device. Dan Goodin, Ars Technica, "Attackers can use Zoom to steal users’ Windows credentials with no warning," 1 Apr. 2020 Weymouth Police Captain Fuller, in an e-mail, wrote that police have contacted the FBI, but stressed that the social media postings that have drawn the attention of law enforcement have not been authenticated as having been made by Allsopp., "The FBI and Weymouth police declined to say what sparked the mutual interest in postings linked in social media to 32-year-old Mark P. Allsopp, who was scheduled to be arraigned Monday in Quincy District Court on multiple charges filed by Weymouth police.," 25 Nov. 2019 Coleberd said a signature from the outlaw Jesse James, whose gang hid in the cave, has been authenticated. San Diego Union-Tribune, "Sam Clemens’ signature appears to be on Mark Twain Cave wall," 27 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'authenticate.' 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 authenticate

1613, in the meaning defined above

History and Etymology for authenticate

see authentic

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Time Traveler for authenticate

Time Traveler

The first known use of authenticate was in 1613

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Statistics for authenticate

Last Updated

29 May 2020

Cite this Entry

“Authenticate.” Dictionary, Merriam-Webster, Accessed 5 Jun. 2020.

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More Definitions for authenticate


How to pronounce authenticate (audio)

English Language Learners Definition of authenticate

: to prove that something is real, true, or genuine : to prove that something is authentic


au·​then·​ti·​cate | \ ə-ˈthen-ti-ˌkāt How to pronounce authenticate (audio) \
authenticated; authenticating

Kids Definition of authenticate

: to prove or serve as proof that something is authentic


transitive verb
authenticated; authenticating

Legal Definition of authenticate

1 : to prove or serve to prove that (something) is genuine especially : to prove that (an item of evidence) is genuine for the purpose of establishing admissibility
2 : to make (a written instrument) valid and effective by marking especially with one's signature authenticate a check

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