Definition of "Heat" :

noun: utility to warm a building

"The heating system wasn't working."

noun: the trait of being intensely emotional

noun: the presence of heat

noun: the sensation caused by heat energy

noun: a preliminary race in which the winner advances to a more important race

noun: a form of energy that is transferred by a difference in temperature

noun: applies to nonhuman mammals: a state or period of heightened sexual arousal and activity

verb: make hot or hotter

"The sun heats the oceans."

verb: gain heat or get hot

"The room heated up quickly."

verb: arouse or excite feelings and passions

verb: provide with heat

"Heat the house."