authenticate
Americanverb (used with object)
-
to establish as genuine.
- Synonyms:
- substantiate, validate, confirm
-
to establish the authorship or origin of conclusively or unquestionably, chiefly by the techniques of scholarship.
to authenticate a painting.
-
to make authoritative or valid.
verb
-
to establish as genuine or valid
-
to give authority or legal validity to
Other Word Forms
Etymology
Origin of authenticate
First recorded in 1565–75; from Medieval Latin authenticātus “made authentic” (past participle of authenticāre ). See authentic, -ate 1
Explanation
When you authenticate something, you establish that it’s the real thing. If you authenticate a painting, for example, you’re sure that it's an original work, not a copy. The verb authenticate came into English in the seventeenth century by way of the Latin word authenticat-, meaning “established as valid.” You’ve probably heard it to mean that a valuable item, like a diamond or a rare vase, is genuine. But not everything that has to be authenticated is worth a lot of money. For example, experts authenticate evidence in an investigation and you authenticate your identity to gain access to your email account.
Vocabulary lists containing authenticate
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"In this study we show how to authenticate a biomarker, verifying that a signal truly comes from life rather than contamination or non-biological chemistry," Shawar adds.
From Science Daily • Feb. 27, 2026
Official media has largely played down the protests but videos have flooded social media, many of which are difficult to authenticate, or have even been manipulated.
From Barron's • Jan. 2, 2026
Passkeys authenticate your identity using a pair of mathematically related values, called keys, one residing with the website or app, the other in your password manager.
From The Wall Street Journal • Dec. 11, 2025
We have yet to authenticate any footage of F-35s being shot down.
From BBC • Jun. 20, 2025
Geri explained that he needed the director of the Uffizi to authenticate the painting.
From "The Mona Lisa Vanishes" by Nicholas Day
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
