From WordNet (r) 3.0 (2006):
heat
n 1: a form of energy that is transferred by a difference in
temperature [syn: heat, heat energy]
2: the presence of heat [syn: hotness, heat, high
temperature] [ant: cold, coldness, frigidity,
frigidness, low temperature]
3: the sensation caused by heat energy [syn: heat, warmth]
4: the trait of being intensely emotional [syn: heat,
warmth, passion]
5: applies to nonhuman mammals: a state or period of heightened
sexual arousal and activity [syn: estrus, oestrus,
heat, rut] [ant: anestrum, anestrus, anoestrum,
anoestrus]
6: a preliminary race in which the winner advances to a more
important race
7: utility to warm a building; "the heating system wasn't
working"; "they have radiant heating" [syn: heating system,
heating plant, heating, heat]
v 1: make hot or hotter; "the sun heats the oceans"; "heat the
water on the stove" [syn: heat, heat up] [ant: chill,
cool, cool down]
2: provide with heat; "heat the house"
3: arouse or excite feelings and passions; "The ostentatious way
of living of the rich ignites the hatred of the poor"; "The
refugees' fate stirred up compassion around the world"; "Wake
old feelings of hatred" [syn: inflame, stir up, wake,
ignite, heat, fire up]
4: gain heat or get hot; "The room heated up quickly" [syn:
heat, hot up, heat up] [ant: chill, cool, cool
down]