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.
The firm builds exposure maps that visualize an individual’s digital vulnerabilities — linking addresses, relatives, dormant emails, old domains, platform accounts, leaked identifiers and dark-web traces into a single cohesive picture. Wyles Daniel, Miami Herald, 31 Dec. 2025 Anyone who builds on the OpenAI API knows how sensitive these identifiers are. Kurt Knutsson, FOXNews.com, 12 Dec. 2025 Gold card applicants are required to provide full personal and identity information for the principal beneficiary, including legal name, birth details, passport information, and other identifiers, according to the form. Billal Rahman, MSNBC Newsweek, 11 Dec. 2025 For the affected FreeStyle Libre 3 sensors, the model numbers are 78768-01 and 78769-01; the unique device identifiers are 00357599844011 and 00357599843014. Charlotte Phillipp, PEOPLE, 5 Dec. 2025 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 2 Jan. 2026.

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