Main entry: heat, heat up
Definition: make hot or hotter
Usage: the sun heats the oceans; heat the water on the stove
Antonyms: cool, cool down, chill
Definition: make cool or cooler
Main entry: heat, heat up, hot up
Definition: gain heat or get hot
Usage: The room heated up quickly
Antonyms: chill, cool, cool down
Definition: loose heat