identity Meaning in the Cambridge English Dictionary
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Meaning of “identity” in the English Dictionary

"identity" in British English

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identitynoun [C or U]

uk   /aɪˈden.tɪ.ti/  us   /-ə.t̬i/
B2 who a ​person is, or the ​qualities of a ​person or ​group that make them different from ​others: The man's identity was being ​keptsecret while he was ​helpingpolice with ​enquiries. I cannot ​reveal the identity of my ​source. The ​informant was given a new identity (= a different ​name and new ​officialdocuments) for ​protection. The ​newspaperphotoapparentlyshowed him in Rome but it was a ​case of mistaken identity (= it was the ​wrongperson). In ​prisonpeople often ​suffer from a ​loss of identity. I ​think my ​job gives me a ​sense of identity.
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(Definition of identity from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"identity" in American English

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identitynoun [C]

 us   /ɑɪˈden·tɪ·t̬i/

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 (= ​mathematicalstatement) 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)

"identity" in Business English

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identitynoun [C or U]

uk   us   /aɪˈdentəti/ (plural identities)
the ​reputation, characteristics, etc. of a ​person or ​organization that makes the ​publicthink about them in a particular way: Companies often ​spend a ​fortune on ​branding in their attempts to communicate their identity.
who a ​person is, or ​information that proves who a ​person is, for ​example, their ​name and ​date of birth: When ​applying for a ​driverlicense or ​identificationcard, you must ​provideproof of your identity. confirm/prove your identity You may be ​asked to ​confirm your identity by ​phone.
(Definition of identity from the Cambridge Business English Dictionary © Cambridge University Press)
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