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

Other Words from authenticate

authenticator \ ə-​ˈthen-​ti-​ˌkā-​tər How to pronounce authenticate (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 Musk, the richest person in the world, has promised to embrace free speech on the platform, add new features, make Twitter’s algorithm open-source and authenticate all users. Los Angeles Times, 26 Apr. 2022 For example, each Louis Vuitton bag made since 1982 bears an alphanumeric code that can help authenticate a piece. Alesandra Dubin, Glamour, 5 Apr. 2022 In response to questions about what Project Veritas may have asked him to do to help authenticate the diary, Mr. Kurlander, through his lawyer, Jonathan Kaplan, declined to comment. New York Times, 20 Mar. 2022 The charging port itself will carry a secure communication to authenticate the vehicle and the customer’s payment details. Michael Taylor, Forbes, 3 Jan. 2022 The company has increased efforts to authenticate the value of items like shoes, baseball cards and musical instruments. Paul R. La Monica, CNN, 4 Dec. 2021 Many brands balk at using a third party like Facebook, Google or Amazon to verify identity, authenticate the user or even handle the payment process. Jonathan Kay, Forbes, 26 Jan. 2022 If two virtual worlds are interoperable, the blockchain will authenticate proof of ownership of your digital goods in both virtual worlds. Dar Meshi, The Conversation, 14 Jan. 2022 But other videos have been impossible to authenticate and substantiate. New York Times, 5 Mar. 2022 See More

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.

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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Dictionary Entries Near authenticate

authentic assessment



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Statistics for authenticate

Last Updated

10 May 2022

Cite this Entry

“Authenticate.” Dictionary, Merriam-Webster, Accessed 20 May. 2022.

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More Definitions for authenticate


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

More from Merriam-Webster on authenticate

Nglish: Translation of authenticate for Spanish Speakers

Britannica English: Translation of authenticate for Arabic Speakers


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