key something to something phrasal verb American English (see also key)

1. 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.

2. 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.
⇒ keyed up

[TahlilGaran] Dictionary of Contemporary English ▲