- a single course in or division of a race or other contest.
- a race or other contest in which competitors attempt to qualify for entry in the final race or contest.
- a single operation of heating, as of metal in a furnace, in the treating and melting of metals.
- a quantity of metal produced by such an operation.
- sexual receptiveness in animals, especially females.
- the period or duration of such receptiveness: to be in heat.
verb (used with object)
verb (used without object)
Origin of heat
Synonyms for heat
Antonyms for heat
Examples from the Web for self-heating
Historical Examples of self-heating
Irons are of two kinds—those which must be heated on a stove, and the self-heating ones.Mechanical Devices in the Home
Edith Louise Allen
- the energy transferred as a result of a difference in temperature
- the random kinetic energy of the atoms, molecules, or ions in a substance or body
- a preliminary eliminating contest in a competition
- a single section of a contest
- Also: in season(of some female mammals) sexually receptive
- in a state of sexual excitement
Word Origin for heat
Old English hætu, hæto "heat, warmth; fervor ardor," from Proto-Germanic *haiti- "heat" (cf. Old Saxon hittia, Old Norse hiti, Old Frisian hete, German hitze "heat," Gothic heito "fever"), from PIE *kaid-, from root *kai- "heat." The same root is the source of Old English hat "hot" and hæða "hot weather" (see hot).
Meaning "a single course in a race," especially a horse race, is from 1660s, perhaps from earlier figurative sense of "violent action; a single intense effort" (late 14c.), or meaning "run given to a horse to prepare for a race" (1570s). This later expanded to "division of a race or contest when there are too many contestants to run at once," the winners of each heat then competing in a final race. Meaning "sexual excitement in animals" is from 1768. Meaning "trouble with the police" attested by 1920. Heat wave "period of excessive hot weather" first attested 1890; earlier in reference to solar cycles.
In addition to the idioms beginning with heat
- heat up
- dead heat
- in heat
- in the heat of the moment
- turn up the heat