cool

adjective

• 1of or at a fairly low temperature:it’ll be a cool afternoon the wind kept them cool
• soothing or refreshing because of its low temperature:a cool drink in the leafy shade figurativethe bathroom was all glass and cool, muted blues
• (especially of clothing) keeping one from becoming too hot:wear your cool, comfortable shirts
• showing no friendliness toward a person or enthusiasm for an idea or project:he gave a cool reception to the suggestion for a research center
• free from excitement or anxiety:he prided himself on keeping a cool head she seems cool, calm, and collected
• (of jazz, especially modern jazz) restrained and relaxed.

• 2 informal fashionably attractive or impressive:I always wore sunglasses to look cool
• excellent: [as exclamation]:a computer you didn’t even have to plug in. Cool!
• used to express acceptance or agreement:if people want to freak out at our clubs, that’s cool

• 3 (a cool ——) informal used to emphasize a specified quantity or amount, especially of money:a cool $15,000 to buy the franchise

noun

• 1 (the cool) a fairly low temperature:the cool of the night air
• a time or place at which the temperature is pleasantly low:the cool of the evening

• 2calmness; composure:he recovered his cool and then started laughing at us

• 3the quality of being fashionably attractive or impressive:all the cool of high fashion

verb

• become or cause to become less hot: [no object]:we dived into the river to cool off figurativehis feelings for her took a long time to cool [with object]:cool the pastry for five minutes
• become or cause to become calm or less excited: [no object]:after I’d cooled off, I realized I was being irrational [with object]:George was trying to cool him down
• (cool down) recover from strenuous physical exertion by doing gentle stretches and exercises; warm down.
• [usually in imperative] (cool it) informal behave in a less excitable manner:“Cool it and tell me why you’re so ecstatic.”