A moderate or refreshing state of cold; moderate temperature of the air between hot and cold; coolness.

A calm temperament.

The property of being cool, popular or in fashion.

(intransitive, literally) To lose heat, to get colder.

(transitive, literally) To make cooler, less warm.

(intransitive, figurative) To become less intense, e.g. less amicable or passionate.

(transitive, figurative) To make less intense, e.g. less amicable or passionate.

(transitive) To kill.

Having a slightly low temperature; mildly or pleasantly cold.

Allowing or suggesting heat relief.

Of a color, in the range of violet to green.

Of a person, not showing emotion; calm and in control of oneself.

Unenthusiastic, lukewarm, skeptical.

Calmly audacious.

Applied facetiously to a sum of money, commonly as if to give emphasis to the largeness of the amount.

(informal) Of a person, knowing what to do and how to behave; considered popular by others.

(informal) In fashion and fancy, part of or befitting the most leading trends and habits of the in crowd; originally hipster slang.

(informal) Of an action, all right; acceptable; that does not present a problem.

(informal) Very interesting or exciting.

(informal) (followed by with) Able to tolerate; to be fine with.

(informal) (of a pair of people) holding no grudge against one another; having no beef.