Definition of Social Security number in English:

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Social Security number


Entry from US English dictionary

(abbreviation SSN)


(In the US) a number in the format 000–00-0000, unique for each individual, used to track Social Security benefits and for other identification purposes.
Example sentences
  • For example, schools and pediatric offices routinely request children's Social Security numbers for registration purposes.
  • Discourage your bank from using the last four digits of your Social Security number as your personal identification number.
  • When you claim a dependent, you're required to list the individual's Social Security number on your tax return.
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