verb

1. To cause an increase in temperature of (an object or space); to cause to become hot (often with "up").

   “I'll heat up the water.”

2. To become hotter.

   “There's a pot of soup heating on the stove.”

3. To excite or make hot by action or emotion; to make feverish.

Synonyms: heat up, hot, hot up, stoke, warm up

adjective

1. Very agitated, angry or impassioned.

   “a heated argument”

2. (usually not comparable) Made warm or hot by some means.

   “a heated greenhouse / swimming pool / towel rail”