Alternative form of in heat

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

(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.

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.

Archaic spelling of heat.

Archaic spelling of heat.

(biology) in estrus; receptive to mating

(military) Acronym of high explosive antitank: a munition using a high explosive shaped charge to breach armour.

A situation has reached a point of great commotion, energy, or activity.