Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “identity”


noun [C]  /ɑɪˈden·tɪ·t̬i/ us  

identity noun [C] (person)

who a person is, or the qualities of a person or group that make them different from others: [U] As a journalist she refuses to reveal the identity of her source.

identity noun [C] (mathematical statement)

algebra an equation (= mathematical statement) that is true for every value given to a variable (= number that can change)
(Definition of identity from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of identity?
Browse related topics

You are looking at an entry to do with Mind and personality, but you might be interested in these topics from the Thinking, dreaming and ideas topic area:

Add Cambridge dictionaries to your browser to your website

More American English definitions for “identity”

Definitions of “identity” in other dictionaries

Word of the Day


When birds roost, they go somewhere to rest or sleep.

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More