Definition of Social Security number in English:

Social Security number

Syllabification: So·cial Se·cur·i·ty num·ber

Entry from US English dictionary

(abbreviation: SSN)

noun

(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.

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Word of the day punctum
Pronunciation: ˈpʌŋ(k)təm
noun
a small, distinct point