identifier

noun

iden·​ti·​fi·​er ī-ˈden-tə-ˌfī(-ə)r How to pronounce identifier (audio)
ə-
: one that identifies

Examples of identifier in a Sentence

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.
Some plans also monitor a broader range of personal identifiers, such as driver's license numbers, passport numbers and email addresses. Kurt Knutsson, FOXNews.com, 28 Feb. 2026 Law enforcement agencies across the country have turned to artificial intelligence to automate labor-intensive tasks, from recognizing biometric identifiers to tracking vehicles to finding leads within thousands of pieces of evidence. Perry Vandell, AZCentral.com, 27 Feb. 2026 His national provider identifier, a unique 10-digit identification number that every eligible entity uses to bill Medicaid for services rendered, has since been deactivated. Mia Cathell, The Washington Examiner, 27 Feb. 2026 The Coordinated Set Identification Service (CSIS) allows two earbuds—or two hearing aids—to be discovered and managed as a coordinated set rather than independently, with resolvable identifiers and set‑level locks. IEEE Spectrum, 26 Feb. 2026 See All Example Sentences for identifier

Word History

First Known Use

1807, in the meaning defined above

Time Traveler
The first known use of identifier was in 1807

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Cite this Entry

“Identifier.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/identifier. Accessed 16 Mar. 2026.

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