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Definition of cool
cool - adj. marked by calm self-control (especially in trying circumstances); unemotional; fashionable and attractive at the time; often skilled or socially adept; (used of a number or sum) without exaggeration or qualification; neither warm nor very cold; giving relief from heat; psychologically cool and unenthusiastic; unfriendly or unresponsive or showing dislike; (color) inducing the impression of coolness; used especially of greens and blues and violets; noun the quality of being at a refreshingly low temperature; great coolness and composure under strain; verb loose heat; lose intensity; make cool or cooler.
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