1 heat /ˈhiːt/ noun
plural heats
1 heat
plural heats
Learner's definition of HEAT
[noncount] : energy that causes things to become warmer
[noncount] : hot weather or temperatures
often used with the
: the level of temperature that is used to cook something
usually singular
[singular] : a source of heat used for cooking something : the hot part of an oven, stove top, etc.
[noncount] chiefly US : the system that is used to provide warmth to a room or building
: strong and often angry feelings
: the time when emotions are most strongly felt used in phrases like in the heat of passion, in the heat of the moment, etc.
see also in the heat of (the) battle at 1battle
chiefly US, informal
the heat : pressure to do something
◊ The expression if you can't stand/take the heat, get out of the kitchen means that you should not try to do a difficult job if you cannot deal with the pressure and problems that are part of the job.
[noncount] : criticism or abuse
[count] : one of several races or contests that are held in order to decide who will be in the final race or contest
see also dead heat

in heat

(US) or British on heat
used to describe a female animal that is ready to have sex and is able to become pregnant

more heat than light

◊ To produce or generate more heat than light means to cause anger without helping to make something better understood.

pack heat

US slang, old-fashioned + humorous
see also prickly heat

— heatless

/ˈhiːtləs/ adjective
2 heat /ˈhiːt/ verb
heats; heated; heating
2 heat
heats; heated; heating
Learner's definition of HEAT
[+ object]
: to cause (something) to become warm or hot

heat up

[phrasal verb]
: to become warm or hot
: to become more active, intense, or angry
heat (something) up or heat up (something) : to cause (something) to become warm or hot see also preheat