(uncountable) Thermal energy. / (uncountable) The condition or quality of being hot. / (uncountable) An attribute of a spice that causes a burning sensation in the mouth.

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

A system that raises the temperature of a room or building. Compare heater. / The act of making something hot.

Causing heat.

present participle of heat

Alternative form of in heat

simple past tense and past participle of heat

(MTE, slang) To get riled up about something, or to be in a state of anger. / Very agitated, angry or impassioned. / (usually not comparable) Made warm or hot by some means.

(biology) in estrus; receptive to mating

Archaic spelling of heat.