authenticator
Americannoun
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a person or thing that authenticates.
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Cryptography. a code used to authenticate a previously transmitted code.
Etymology
Origin of authenticator
First recorded in 1860–65; authenticate + -or 2
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.
At some point, it may not need an authenticator at all.
From The Wall Street Journal • Jan. 21, 2026
The bag is ready for purchase where it would previously also be reviewed by a more senior authenticator.
From The Wall Street Journal • Jan. 21, 2026
“They just frequently take on new forms, or target new platforms such as the authenticator app.”
From Los Angeles Times • Aug. 11, 2025
He also recommended adding a PIN number to the sim card, which can be done in a phone's settings, and the use of authenticator apps to generate random codes, instead of ones sent by text.
From BBC • Mar. 3, 2025
Keeper's message simultaneously loaded into the recon-patroller's computer as authenticator for the mission and demolition and laser gun settings.
From The Universe — or Nothing by Moldeven, Meyer
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.
