cool definition

1. the quality of being at a refreshingly low temperature
• examples: the cool of early morning
2. make cool or cooler
• examples: Chill the food
3. loose heat
• examples: The air cooled considerably after the thunderstorm
4. lose intensity
• examples: His enthusiasm cooled considerably
5. neither warm nor very cold; giving relief from heat
• examples: a cool autumn day
• examples: a cool room
• examples: cool summer dresses
• examples: cool drinks
• examples: a cool breeze
6. marked by calm self-control (especially in trying circumstances); unemotional
• examples: play it cool
• examples: keep cool
• examples: stayed coolheaded in the crisis
• examples: the most nerveless winner in the history of the tournament
7. (color) inducing the impression of coolness; used especially of greens and blues and violets
• examples: cool greens and blues and violets
8. psychologically cool and unenthusiastic; unfriendly or unresponsive or showing dislike
• examples: relations were cool and polite
• examples: a cool reception
• examples: cool to the idea of higher taxes
9. (used of a number or sum) without exaggeration or qualification
• examples: a cool million bucks
10. fashionable and attractive at the time; often skilled or socially adept
• examples: he's a cool dude
• examples: that's cool
• examples: Mary's dress is really cool
• examples: it's not cool to arrive at a party too early