0-9 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
1. [A] protected/private character string used to authenticate an identity or to authorize access to data. [NIS] 2 . In data communications, a word, character, or combination thereof, that permits access to otherwise inaccessible data, information, or facilities. (188)