In physics, heat is energy as it spontaneously passes between a system and its surroundings, other than as work or with the transfer of matter. In thermodynamics, finer detail of the process of transfer is in principle unspecified. When there is a suitable physical pathway, heat transfer occurs from a hotter to a colder body. The transfer can be direct, by contact, from the source to the destination body, as in conduction combined with radiation, or remote, as in radiation without conduction; or indirect, by conduction and radiation through a thick solid wall, or by way of an intermediate fluid body, as in convective circulation.

A high-explosive anti-tank (HEAT) warhead is a type of munition made of an explosive shaped charge that employs the Munroe effect, to create a high velocity partial stream of metal in a state of superplasticity, which is used to penetrate solid vehicle armour.

WWE Heat (formerly known as Sunday Night Heat also known as Heat) was a professional wrestling television program produced by World Wrestling Entertainment (WWE). Originally produced under the World Wrestling Federation banner (WWF), it aired on USA Network, MTV and Spike TV in the United States, Channel 4, Sky1 & Sky Sports in the United Kingdom and CTV Sportsnet in Canada.