password🔊

(watchword) (security) A word relayed to a person to gain admittance to a place or to gain access to information.

(cryptography) (cryptography) A string of characters used to log in to a computer or network, to access a level in a video game, and so on; (archetypally) a (word#Noun) but nowadays often an (alphanumeric#Adjective) string or a (phrase#Noun).

To protect with a password.