Definition of “heat” - Learner’s Dictionary

heat

noun uk us /hiːt/
HOT [ U ]

B1 the quality of being hot or warm:

the heat of summer
the heat

hot weather:

I don't really like the heat.
TEMPERATURE [ U, no plural ]

B1 the temperature of something:

Cook on a low heat.
the heat US (UK the heating)

the system that keeps a building warm:

Could you turn the heat up a little?
RACE [ C ]

a competition, especially a race, which decides who will be in the final event

→ See also dead heat , in the heat of the moment

(Definition of “heat noun” from the Cambridge Learner's Dictionary © Cambridge University Press)