COOL
—adjective. 1 of or at a fairly low temperature, fairly cold. 2 suggesting or achieving coolness. 3 calm, unexcited. 4 lacking enthusiasm. 5 unfriendly (a cool reception). 6 calmly audacious. 7 (prec. By a) colloq. At least (cost a cool thousand). 8 slang esp. Us marvellous. —none. 1 coolness. 2 cool air or place. 3 slang calmness, composure. —verb. (often foll. By down, off) make or become cool. ? cool it slang relax, calm down. ? coolly adverb. Coolness none. [old english]