'Password' definitions:

Definition of 'password'

From: WordNet
noun
A secret word or phrase known only to a restricted group; "he forgot the password" [syn: password, watchword, word, parole, countersign]

Definition of 'Password'

From: GCIDE
  • Password \Pass"word`\, n. A word to be given before a person is allowed to pass; a watchword; a countersign. --Macaulay. [1913 Webster]