認証の定義と意味 - メリアム・ウェブスター

AUTHENTICATE Definition & Meaning - Merriam-Webster Est. 1828 Dictionary Definition Definition Synonyms Synonym Chooser Example Sentences Word History Rhymes Entries Near Cite this Entry Citation Kids Definition Kids Legal Definition Legal More from M-W Show more Show more Citation Kids Legal More from M-W Save Word To save this word, you'll need to log in. Log In authenticate verb au·​then·​ti·​cate ə-ˈthen-ti-ˌkāt ȯ- authenticated ; authenticating Synonyms of authenticate transitive verb : to prove or serve to prove to be real, true, or genuine authenticate a document authenticator ə-ˈthen-ti-ˌkā-tər ȯ- noun Synonyms of authenticate Relevance certify guarantee affirm attest testify (to) See All Synonyms & Antonyms in Thesaurus 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 Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback . Keep in mind that items like this have not been professionally tested or authenticated . — Michele Laufik, Martha Stewart , 20 Apr. 2026 By minting a cryptographically perfect digital signature based on MD5, the attackers forged a certificate that authenticated their malicious update server. — Stephen Clark, ArsTechnica , 17 Apr. 2026 Look for multiple verified sources that can help authenticate the image. — ABC News , 1 Apr. 2026 Regardless, his helmet — which hitters must tap to signal for ABS — was authenticated and shipped to the Hall of Fame. — Gary Phillips, Hartford Courant , 29 Mar. 2026 See All Example Sentences for authenticate Word History Etymology borrowed from Medieval Latin authenticātus, past participle of authenticāre "to stamp as genuine or authoritative," derivative of Latin authenticus "original (of documents)" — more at authentic Note: Compare as a secondary source Middle French autentiquer "to guarantee that something conforms to a norm." First Known Use 1613, in the meaning defined above Time Traveler The first known use of authenticate was in 1613 See more words from the same year Rhymes for authenticate abbreviate accelerate accommodate accumulate acuminate adjudicate adulterate affiliate agglomerate agglutinate alleviate amalgamate See All Rhymes for authenticate Browse Nearby Words authentic assessment authenticate authentication See all Nearby Words Cite this Entry Style MLA Chicago APA Merriam-Webster “Authenticate.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/authenticate. Accessed 6 May. 2026. Copy Citation Kids Definition authenticate verb au·​then·​ti·​cate ə-ˈthent-i-ˌkāt ȯ- authenticated ; authenticating : to prove or serve to prove that something is authentic authentication -ˌthent-i-ˈkā-shən noun Legal Definition authenticate transitive verb au·​then·​ti·​cate authenticated ; authenticating 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 Last Updated: 21 Apr 2026 - Updated example sentences Love words? Need even more definitions? Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! 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