- 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)
- heat barrier,
- heat capacity,
- heat cramp,
- heat cramps,
- heat death
Origin of heat
Examples from the Web for heatless
There was only the wind and the snow whipping around darkened, heatless homes.Nor’easter Brings Dangerous Beauty to Rockaways After Hurricane Sandy|Michael Daly|November 8, 2012|DAILY BEAST
Had the adrenaline not flowed throughout my body in such a torrent, I might have felt the effects of the heatless room even more.
Yet even then, according to the current hypothesis, the heatless molecule will still be a thing instinct with life.
Such a heatless condition has been approached, but as yet not quite attained, in laboratory experiments.
There the shivering chill of midnight made a strong contrast to the burning, heatless glitter of midday.My Attainment of the Pole|Frederick A. Cook
John watched the ash in Hatch's cigar turning from a glowing red to a heatless gray.Spring Street|James H. Richardson
Rubber-clad soldiers moved about in the blue glow of the globes sending down their heatless light from the ceiling.Astounding Stories, May, 1931|Various
- 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 hætan "to heat; to become hot," from Proto-Germanic *haitijanam (see heat (n.)). Related: Heated (with many variants in Middle English); heating. Cf. Middle Dutch heeten, Dutch heten, German heizen "to 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 physics, a form of energy associated with the movement of atoms and molecules in any material. The higher the temperature of a material, the faster the atoms are moving, and hence the greater the amount of energy present as heat. (See infrared radiation.)
In addition to the idioms beginning with heat
- heat up
- dead heat
- in heat
- in the heat of the moment
- turn up the heat