Nouns

(n)warm upperforming mild exercises to prepare for some more strenuous activity“the singers have to warm up”, “the marathon runner did not warm up and hurt himself”

Verbs

(v)warm uprun until the normal working temperature is reached“We warmed up the car for a few minutes”
(v)warm upbecome more friendly or open“She warmed up after we had lunch together”
(v)warm, warm upget warm or warmer“The soup warmed slowly on the stove”
(v)warm upcause to do preliminary exercises so as to stretch the muscles“The coach warmed up the players before the game”
(v)limber up, warm up, loosen upmake one's body limber or suppler by stretching, as if to prepare for strenuous physical activity