social security number

See also: social-security number

English

Alternative forms

Noun

social security number (plural social security numbers)

  2. (US) A nine-digit number issued by the Social Security Administration to citizens, permanent residents, and certain temporary workers, primarily to track people for taxation purposes, and in recent years serving as a de facto national identification number.
    Alternative forms: SSN (initialism), social (clipping, colloquially only)
    Hypernyms: number, identifier
  3. A corresponding number in other countries.
    Hypernyms: number, identifier
    Coordinate terms: SIN, social insurance number (Canada); NI number, national insurance number (UK)

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Further reading

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