warm up

(intransitive) To become warmer.
(transitive) To heat or reheat (e.g. food).
(intransitive, transitive) To reach, or cause to reach, a normal operating temperature (of a car for example).
(figuratively, intransitive) To physically or mentally prepare oneself, something or someone for an activity.
(figuratively, intransitive) To physically or mentally prepare oneself, something or someone for an activity.
(figuratively, transitive) To physically or mentally prepare oneself, something or someone for an activity.
(figuratively, intransitive) Synonym of warm (to favor increasingly).
(transitive) Synonym of warm (“prepopulate a cache”).
(Internet, transitive) Synonym of warm (“send mail from a domain to improve reputation”).