(with up) To heat; to make or become hot. / (with up) To become lively or exciting.

Hotly, at a high temperature. / Rapidly, quickly. / (especially in the phrase "come in hot", "go in hot") While shooting, while firing one's weapon(s).

(of an object) Having or giving off a high temperature. / (of a person or animal) Feeling the sensation of heat, especially to the point of discomfort. / Feverish.

(of individual dishes of food) served one at a time as soon as cooked

(traffic control) Acronym of high occupancy or toll.

(electronics) Acronym of hybrid-orientation technology. (CMOS fabrication technology that uses PMOS and NMOS substrates with differing orientations)

(informal, idiomatic) Enthusiastic for. / (informal, idiomatic) Knowledgeable about. / (informal, idiomatic) Skilled at.

(obsolete, colloquial, UK) A drink of hot spirits with sugar and water.

(slang) A condition of physical attraction toward (for) someone.

Third-person singular simple present indicative form of hot