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 The document was reviewed by The New York Times and authenticated by a person who spoke with Alshamrani shortly after the incident., "You're using a browser set to private or incognito mode.," 9 Dec. 2019 The document was reviewed by The New York Times and authenticated by a person who spoke with Lieutenant Alshamrani shortly after the incident. New York Times, "Pensacola Attack Probed for Terrorism Link. Saudi Suspect Clashed With Instructor.," 8 Dec. 2019 By analyzing these shorter sections of DNA, the scientists behind the study are contributing to a growing database that can be checked to authenticate what’s being sold. Chase Purdy, Quartz, "The swordfish you’re eating might actually be shark," 5 Nov. 2019 Lafite is among the most faked wines in China, so the capsules on its Long Dai bottles conceal chips to allow buyers to authenticate a bottle using their smartphones. The Economist, "Château Lafite cracks open its first Chinese vintage," 26 Sep. 2019 Then the user is authenticated as eligible to cast a vote. Nir Kshetri, The Conversation, "Blockchain voting is vulnerable to hackers, software glitches and bad ID photos – among other problems," 18 Oct. 2019 In a statement, Apple explained how Safari authenticates websites: Apple protects user privacy and safeguards your data with Safari Fraudulent Website Warning, a security feature that flags websites known to be malicious in nature. Matthew De Silva, Quartz, "Apple’s data sharing with firms tied to the Chinese government may endanger dissidents," 16 Oct. 2019 The process uses software that authenticates data by embedding a unique, identifying text string that matches to the organization’s data inventory. Fortune, "To Protect Against Cyber Attacks, Companies Need to Address Data Manipulation. Here’s How," 23 Sep. 2019 Griffen had also given the state until Sept. 23 to respond to questions and requests to authenticate documents from the applicant in the case. San Diego Union-Tribune, "Arkansas attorney general wants judge barred from her cases," 18 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

12 Dec 2019

Cite this Entry

“Authenticate.” The Dictionary, Merriam-Webster Inc., Accessed 14 December 2019.

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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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