If you key something in, you put information into a computer or you give the computer a particular instruction bytyping the information or instruction on the keyboard.
Brian keyed in his personal code. [VERBPARTICLE noun]
[Also VERB noun PARTICLE]
More Synonyms of key in
See full dictionary entry for key
key in in British English
verb
(tr, adverb)
to enter (information or instructions) in a computer or other device by means of a keyboard or keypad
key in in American English
to input (data) by means of a keyboard or keypad
See full dictionary entry for key
Examples of 'key in' in a sentence
key in
But under cover of opening her locker and heading for the showers, Petra unobtrusively dropped the sauna key in Carol's lap.
Val McDermid THE LAST TEMPTATION (2002)
There'd be steps on the path, then a key in the lock... Suddenly the phone rang.
Stewart, Michael COMPULSION
There was another door on the opposite side of the room with a key in the lock.
Higgins, Jack CONFESSIONAL
For safekeeping, he put the key in his boot along with his hunting knife.
J. A. Jance HOUR OF THE HUNTER (1991)
(verb)
Definition
to enter (information or instructions) into a computer by means of a keyboard