Real Dictionary

heat
a sudden and violent jarring blow or impact [...]
any of a large group of nitrogenous compounds of high molecular weight that are essential constituents of all living organisms. They consist of one or more chains of amino acids linked by peptide bonds and are folded into a specific three-dimensional shap
special emphasis or significance attached to something [...]
the act of responding; reply or reaction [...]
the energy transferred as a result of a difference in temperature [...]
the state or quality of being tolerant [...]
uncountable noun: Heat is warmth or the quality of being hot.
uncountable noun: The heat is very hot weather.
verb: When you heat something, you raise its temperature, for example by using a flame or a special piece of equipment.