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Definition of identifier

identifier

/aɪˈdɛn.tɪ.faɪ.ɚ/
i · den · ti · fi · er
Adverb:identifiably
•
Plural:identifiers
•
Adjective:identifiable
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identifier Lexical Profile

identifier Game Scores & Validity

• noun

1

A sequence of characters, symbol, name, or code used to uniquely distinguish or recognize a person, object, or record.

Example

"Every book published commercially is assigned a unique numeric identifier known as an ISBN."

2

A lexical token or user-defined name in computer programming that names a variable, function, class, or other entity.

Example

"In most programming languages, an identifier cannot begin with a numerical digit or contain spaces."

3

A person or device that recognizes, verifies, or establishes the identity of someone or something.

Example

"The botanist served as the primary identifier of rare orchid specimens collected during the expedition."

Synonyms
View all synonyms for identifier

• Nearby Words

identifiable
identifiably
identification
identifier
identify
identikit
identity

Word Origin & Etymology

Formed in English from the verb 'identify' plus the agent suffix '-er', ultimately tracing back to Late Latin 'identificare', from Latin 'idem' meaning 'the same'.

Cite this Entry

Wordmom. (2026). Definition of Identifier. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/identifier
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