noun
social security number; SSN
Refers specifically to the US Social Security number. Used in contexts discussing American identification systems.
アメリカでは、社会保障番号は重要な個人識別番号です。
In the US, the Social Security number is an important personal identification number.
Compound of 社会 (society), 保障 (security, guarantee), and 番号 (number). A direct translation of the English term 'social security number'.