1 American English informal
if you key a win for your team, you help it win a game because you play very well:
Abdul keyed the game with three touchdowns.
2 British EnglishTIC
to prepare a surface so that a covering such as paint will stick to it
key something ↔ inphrasal verb
to put information into a computer or other machine, using buttons or a keyboard:
Key in your password and press 'Return'.
key something to somethingphrasal verb
to make or change a system so that it works well with something else:
The daycare hours are keyed to the needs of working parents.
if the level, price, or value of something is keyed to something else, it is related to it and they rise and fall at the same time:
Pensions are keyed to the rate of inflation.