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|Noun||1.||identification number - a numeral or string of numerals that is used for identification; "she refused to give them her Social Security number"|
ABA transit number, bank identification number, BIN - an identification number consisting of a two-part code assigned to banks and savings associations; the first part shows the location and the second identifies the bank itself
license number, registration number - the number on the license plate that identifies the car that bears it
Social Security number - the number of a particular individual's Social Security account
positive identification - evidence proving that you are who you say you are; evidence establishing that you are among the group of people already known to the system; recognition by the system leads to acceptance; "a system for positive identification can prevent the use of a single identity by several people"