plural of heat (countable senses)

(plural noun, dated) A period of hot weather.

(biology) in estrus; receptive to mating

Archaic spelling of heat.

Archaic spelling of heat.

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

(rare) Hot.

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

The heating of something at constant pressure.

The heating of an electrical conductor by eddy currents induced by a varying magnetic field.