identifier
Americannoun
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identifiers
plural
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something, such as a name, number, code, label, etc., that serves to identify or represent a person or thing.
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a book, computer application, or other source that one can use to identify something, such as a bird, plant, etc., by matching it with a sound, photo, or description in an inventory.
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a person who identifies someone or something.
noun
Other Word Forms
Derived Forms
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de-identifiernoun
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non-identifiernoun
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quasi-identifiernoun
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self-identifiernoun
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sub-identifiernoun
Inflected Forms
Nouns
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.
See Examples For:
The hackers also obtained access to unique student identifier numbers as well as information about gender, race or ethnicity, primary language, country of origin and English learner status.
From Los Angeles Times ● Oct. 17, 2026
That dollar amount served as a unique identifier in a separate disclosure table showing OBDC’s valuation methods for different categories of Level 3 investments.
From The Wall Street Journal ● May 13, 2026
Through the children not in school registers, there will be a single unique identifier for every child and a requirement for every council to have multi-agency child protection team.
From BBC ● Jun. 1, 2025
The artist’s last name is written in block letters along one edge, but there’s some confusion over whether the artist or the school added it later as an identifier.
From Los Angeles Times ● Apr. 7, 2025
In the spot where the identifier should have been, there were instead a censor’s thick black box and the words “I.D. Temporarily Removed from System.”
From "Escape from Mr. Lemoncello's Library" by Chris Grabenstein
Since the public rolls don’t include voters’ unique identifiers, people at the lab also knew linking them to HSI’s data would produce mismatches — what the staffer called an “ungodly” number of false positives.
From Salon ● Aug. 15, 2026
These patterns act as unique optical identifiers that are difficult to replicate, making them useful for anti-counterfeiting and traceability applications.
From Science Daily ● Apr. 21, 2026
When we entrust digital platforms with our biometric data, we hand over unique, irreplaceable biological identifiers.
From The Wall Street Journal ● Feb. 3, 2026
"We would like to reiterate that no payment details or order history information has been accessed and the impacted personal data remains limited to basic personal identifiers as advised previously," they said.
From BBC ● Sep. 28, 2025
She plays the tape backward and forward, stops and starts, scribbles down identifiers she missed.
From "Orphan Train" by Christina Baker Kline
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
