Dictionary

Thermal energy.

Example: This furnace puts out 5000 BTUs of heat.   That engine is really throwing off some heat.   Removal of heat from the liquid caused it to turn into a solid.

The condition or quality of being hot.

Example: Stay out of the heat of the sun!

An attribute of a spice that causes a burning sensation in the mouth.

Example: The chili sauce gave the dish heat.

A period of intensity, particularly of emotion.

Example: It's easy to make bad decisions in the heat of the moment.

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

Example: I'll heat up the water.

To become hotter.

Example: There's a pot of soup heating on the stove.

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

To excite ardour in; to rouse to action; to excite to excess; to inflame, as the passions.

(plural noun) A period of hot weather.

Example: Everyone suffered during the heats of July.