Definition of hottest:
(adj) :
Relating to heat and conditions which produce it.
(adj) :
(of an object) Having or giving off a high temperature.
(adj) :
(of a person or animal) Feeling the sensation of heat, especially to the point of discomfort.
(adj) :
Feverish; feeling a high fever.
(adj) :
Active, in use or ready for use (like a bullet or a firing range), turned on (like a microphone or camera).
(adj) :
(US, not comparable) Electrically charged.