Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun US A nine-digit number issued to citizens, permanent residents, and temporary (working) residents under section 205(c)(2) of the Social Security Act, codified as 42 U.S.C. § 405(c)(2). The number is issued to an individual by the Social Security Administration, an agency of the U.S. Federal Government. Its primary purpose is to track individuals for
taxation purposes. Abbreviated asSSN . In recent years the SSN has become ade facto national identification number. - noun A corresponding number in other countries.
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