the state of a body perceived as having or generating a relatively high degree of warmth.

the condition or quality of being hot

the heat of an oven.

the degree of hotness; temperature

moderate heat.

the sensation of warmth or hotness

unpleasant heat.

a bodily temperature higher than normal

the heat of a fever; the feeling of heat caused by physical exertion.

added or external energy that causes a rise in temperature, expansion, evaporation, or other physical change.

Physics . a nonmechanical energy transfer with reference to a temperature difference between a system and its surroundings or between two parts of the same system. Symbol

Q

a hot condition of the atmosphere or physical environment; hot season or weather.

a period of hot weather.

a sharp, pungent flavor, as that produced by strong spices.

warmth or intensity of feeling; vehemence; passion

He spoke with much heat and at great length.

maximum intensity in an activity, condition, etc.; the height of any action, situation, or the like

the heat of battle; the heat of passion.

extreme pressure, as of events, resulting in tension or strain

In the heat of his hasty departure he forgot his keys.

a single intense effort; a sustained, concentrated, and continuous operation

The painting was finished at a heat.

Slang . intensified pressure, esp. in a police investigation.

Slang . the police.

Slang . armed protection, esp. a pistol, revolver, or other firearm

All guards carry some heat.

Sports .

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.

Metallurgy .

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.

Zoology .

sexual receptiveness in animals, esp. females.

the period or duration of such receptiveness

to be in heat.

to make hot or warm (often fol. by up ).

to excite emotionally; inflame or rouse with passion.

to become hot or warm (often fol. by up ).

to become excited emotionally. ?

heat up, to increase or become more active or intense

Business competition will heat up toward the end of the year.

noun

cold , cool , coolness , disinterest , frigidity

verb

cool , freeze

noun

calefaction , calidity , dog days , fever , fieriness , heatwave , hotness , hot spell , hot weather , incalescence , incandescence , sultriness , swelter , torridity , torridness , warmness , warmth , agitation , ardor , desire , earnestness , excitement , ferocity , fervor , fury , impetuosity , intensity , rage , vehemence , violence , zeal , excitation , estrus , rut , season , bluecoat , finest , officer , patrolman , patrolwoman , peace officer , police , police officer , policewoman , calescence , caloric , candescence , cauma , greenhouse effect , temperature

verb

bake , bask , blaze , boil , broil , calorify , chafe , char , enflame , enkindle , fire , flame , flush , frizzle , fry , glow , grill , grow hot , grow warm , ignite , incandesce , incinerate , inflame , kindle , melt , oxidate , oxidize , perspire , raise the temperature , reheat , roast , scald , scorch , sear , seethe , set on fire , singe , smelt , steam , sun , swelter , tepefy , thaw , toast , warm , warm up , ardor , calefy , caloric , cook , degree , energy , excite , excitement , fever , firearm , gun , hotness , insulate , intensity , ire , passion , pressure , rage , simmer , stress , temperature , warmness , warmth , zeal