(simile) Calm and composed even in difficult or frustrating situations; self-possessed.

A period of increased pride in British culture during the 1990s, closely associated with the New Labour government of that period.

(Australia, southeast Australia) The arrival of a cold front in the afternoon or evening after a day of high summertime temperatures. The arrival of the front often produces falls in temperature in the order of 10°C to 15°C and sometimes thunderstorm activity.

(intransitive) To decrease in temperature, activity, or temper. / (transitive) To cause to decrease in temperature, activity or temper.

(of a nuclear reactor) that uses liquid sodium as a coolant

The principle that anything is acceptable to do, use, wear etc. so long as it is cool.

Flame whose maximal temperature is below about 400°C (752°F), releasing very little heat, light, and carbon dioxide.

plural of cool flame

plural of cool box

(Internet slang, humorous) An asshole (especially in the context of a jocular phonetic reception by an American of a Hispanic saying the Spanish word culero, meaning "asshole").