Heat meaning : Thermal energy. The condition or quality of being hot. An attribute of a spice that causes a burning sensation in the mouth. A period of intensity, particularly of emotion. An undesirable amount of attention. The police. One or more firearms. A fastball. A condition where a mammal is aroused sexually or where it is especially fertile and therefore eager to mate. A preliminary race, used to determine the participants in a final race One cycle of bringing metal to maximum temperature and working it until it is too cool to work further. A hot spell. Heating system; a system that raises the temperature of a room or building. The output of a heating system. In omegaverse fiction, a cyclical period in which alphas and omegas experience an intense, sometimes irresistible biological urge to mate.