national insurance number

English

Alternative forms

Noun

national insurance number (plural national insurance numbers)

  2. (UK, taxation) A number used in the administration of the national insurance or social security system, and also used as a de facto national identification number.
    Alternative form: NI number
    Hypernyms: number, identifier
    Coordinate terms: (Canada) SIN, (US) SSN, ITIN, EIN, TIN
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