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."