Social Security Number
type: Class
preferred label: SSN
subclass of: RXwl9xfFnpmQn8Ex816ROD
definition: A Social Security Number (SSN) is a nine-digit identification number issued by the U.S. Social Security Administration. Primarily used for tracking individuals for taxation purposes, the SSN has also become a de facto national identification number used for various other legal, financial, and personal identification activities.