Social Security number
noun /ˌsəʊʃl sɪˈkjʊərəti nʌmbə(r)/
/ˌsəʊʃl sɪˈkjʊrəti nʌmbər/
(abbreviation SSN)
- (in the US) an official identity number that everyone is given when they are born
社会保障号码（美国人出生时得到的正式身份号码） CultureThe SSN was originally a qualification for work and social security, but in 1987 the US government decided that children should also be given numbers. The number is now also used in other ways, for example, on cheques and driving licenses and as a student's number at college or university.