- cool
- cool [ko͞ol]adj.[ME & OE col < IE base * gel-, cold, to freeze > CHILL, COLD, L gelu]1. moderately cold; neither warm nor very cold2. tending to reduce discomfort in warm or hot weather [cool clothes]3.a) not excited; calm; composed [cool in an emergency ]☆ b) marked by control of the emotions; restrained [cool jazz]c) Slang emotionally uninvolved; uncommitted; dispassionate4. showing dislike or indifference; not cordial [a cool manner]5. calmly impudent or bold6. not suggesting warmth: said of colors in the blue-green end of the spectrum7. Informal without exaggeration [he won a cool thousand dollars ]☆ 8. Slang very good, pleasing, etc.; excellentadv.in a cool mannern.1. a cool place, time, thing, part, etc. [the cool of the evening ]☆ 2. Slang cool, dispassionate attitude or mannervi.[ME colien < OE colian, to cool]to become cool or coldervt.to make cool or colder——————cool down1. to lower the body temperature, pulse, etc. after vigorous exercise2. to become less heated, passionate, agitated, angry, etc.——————☆ cool itSlang to calm down——————cool off1. to calm down2. to lose enthusiasm, interest, etc.——————☆ cool out Slangto make or become relaxed, calm, mollified, etc. [soothing words cooled him out]——————☆ play it coolSlang to exercise strict control over one's emotions; stay aloof, unenthusiastic, or uncommittedcoolishadj.coollyadv.coolnessn.SYN.- COOL, in this comparison, implies freedom from the heat of emotion or excitement, suggesting a calm, dispassionate attitude or a controlled alertness in difficult circumstances; COMPOSED suggests readiness to meet a trying situation through self-possession or the disciplining of one's emotions; COLLECTED stresses a being in full command of one's faculties or emotions in a distracting situation; UNRUFFLED suggests the maintenance of poise or composure in the face of something that might agitate or embarrass one; NONCHALANT stresses a cool lack of concern or casual indifference-ANT. EXCITED, AGITATED
English World dictionary. V. Neufeldt. 2014.