heat

1a (1) :  a condition of being hot :  warmth snow melting in the heat of the sun (2) :  a marked or notable degree of hotness The heat was intense.b :  pathological excessive bodily temperature the heat of the feverc :  a hot place or situation get out of the heatd (1) :  a period of heat an unbroken heat (2) :  a single complete operation of making something warm or hot; also :  the quantity of material so heatede (1) physics :  added energy that causes substances to rise in temperature, fuse, evaporate, expand, or undergo any of various other related changes, that flows to a body by contact with or radiation from bodies at higher temperatures, and that can be produced in a body (as by compression) (2) physics :  the energy associated with the random motions of the molecules, atoms, or smaller structural units of which matter is composedf :  appearance, condition, or color of something as indicating its temperature when the rod is at the proper welding heat

2a :  intensity of feeling or reaction :  passion answered with considerable heatb :  the height or stress of an action or condition in the heat of battlec :  sexual excitement especially in a female mammal like an animal in heat; specifically :  estrus

3 :  a single continuous effort: such asa :  a single round of a contest (such as a race) having two or more rounds for each contestant won two heats out of threeb :  one of several preliminary contests held to eliminate less competent contenders won the second heat but finished third in the final race

4 :  pungency of flavor Add some cayenne pepper for extra heat.

5a slang (1) :  the intensification of law-enforcement activity or investigation waited until the heat was off (2) :  policeb :  pressure, coercion turn up the heat on your congresspersonc :  abuse, criticism took heat for her mistakes

6 baseball :  smoke 8 throwing some heat

7 slang :  gun 1b was packing heat

:  to make or become warm or hot

1 :  a condition of being hot :  warmth We enjoyed the heat of the fire.

2 :  hot weather heat and humidity

3 :  a form of energy that causes an object to rise in temperature

4 :  strength of feeling or force of action In the heat of anger, I said some cruel things.

5 :  a single race in a contest that includes two or more races

:  to become warm or hot

1a:  the state of a body or of matter that is perceived as opposed to cold and is characterized by elevation of temperature :  a condition of being hot; especially :  a marked or notable degree of this state :  high temperatureb (1):  a feverish state of the body :  pathological excessive bodily temperature (as from inflammation) knew the throbbing heat of an abscess the heat of the fever (2):  a warm flushed condition of the body (as after exercise) :  a sensation produced by or like that produced by contact with or approach to heated matterc (1):  added energy that causes substances to rise in temperature, fuse, evaporate, expand, or undergo any of various other related changes, that flows to a body by contact with or radiation from bodies at higher temperatures, and that can be produced in a body (as by compression) (2):  the energy associated with the random motions of the molecules, atoms, or smaller structural units of which matter is composed

2:  sexual excitement especially in a female mammal; specifically :  estrus