heat.
Thermal energy.
Meaning & usage
Thermal energy.
This furnace puts out 5000 BTUs of heat. That engine is really throwing off some heat. Removal of heat from the liquid caused it to turn into a solid.
The condition or quality of being hot.
Stay out of the heat of the sun!
An attribute of a spice that causes a burning sensation in the mouth.
The chili sauce gave the dish heat.
A period of intensity, particularly of emotion.
It's easy to make bad decisions in the heat of the moment.
An undesirable amount of attention.
The heat from her family after her DUI arrest was unbearable.
A fastball.
The catcher called for the heat, high and tight.
A condition in which a mammal is aroused sexually or where it is especially fertile and therefore eager to mate.
The male canines were attracted by the female in heat.
A condition in which a mammal is aroused sexually or where it is especially fertile and therefore eager to mate. In omegaverse fiction, a cyclical period in which omegas experience an intense, sometimes irresistible biological urge to mate.
A condition in which a mammal is aroused sexually or where it is especially fertile and therefore eager to mate. The sexual arousal of a person, likened to that of a mammal.
A condition in which a mammal is aroused sexually or where it is especially fertile and therefore eager to mate. Semi-softcore NSFW art, primarily when posted to video-sharing websites.
A preliminary race, used to determine the participants in a final race.
The runner had high hopes, but was out of contention after the first heat.
A stage in a competition, not necessarily a sporting one; a round.
One cycle of bringing metal to maximum temperature and working it until it is too cool to work further.
I can make a scroll like that in a single heat.
A hot spell.
The children stayed indoors during this year's summer heat.
Heating system; a system that raises the temperature of a room or building.
I'm freezing; could you turn on the heat?
The output of a heating system.
During the power outage we had no heat because the controls are electric. Older folks like more heat than the young.
A violent action unintermitted; a single effort.
The police.
The heat! Scram!
One or more firearms.
Stylish and valuable sneakers.
Whoa, that guy is rocking some serious heat.
A negative reaction from the audience, especially as a heel (or bad character), or in general.
Where this word comes from
From Middle English hete, from Old English hǣtu, from Proto-West Germanic *haitī, from Proto-Germanic *haitį̄ (“heat”), from Proto-Indo-European *keHy- (“heat; hot”). Cognate with Scots hete (“heat”), Saterland Frisian Hatte (“heat”), Old High German heizī (“heat”). Related also to Dutch hitte (“heat”), German Hitze (“heat”), Swedish hetta (“heat”), Faroese and Icelandic hiti (“heat”). Related to hot.
To cause an increase in temperature of (an object or space); to cause to become hot (often with "up").
I'll heat up the water.
To become hotter.
There's a pot of soup heating on the stove.
To excite or make hot by action or emotion; to make feverish.
To excite ardour in; to rouse to action; to excite to excess; to inflame, as the passions.
To arouse, to excite (sexually).
The massage heated her up.
Where this word comes from
From Middle English heten, from Old English hǣtan (“to heat; become hot”), from Proto-Germanic *haitijaną (“to heat, make hot”).
simple past and past participle of heat
Where this word comes from
Either an alternative spelling of het (“heated”), a continuation of late Middle English heet, het (an analogical simple past of heten (“to heat”) created on the basis of bet, the past tense of beten (“to beat”)), or a later analogical formation from the past forms of beten's modern reflex beat.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.