1 chilly, chill, chilling, cooling, unheated; chilled, cold, refreshing, fresh:
It's rather cool outside today. I'd prefer some cool lemonade.
2 calm, serene, collected, level-headed, quiet, unexcited, unemotional, undisturbed, unexcitable, unruffled, unflappable, cool-headed, relaxed, controlled, under control, self-possessed, self-controlled, unperturbed, phlegmatic, composed, imperturbable:
He remains cool even in a crisis.
3 dispassionate, cold, cold-blooded, emotionless, deliberate, cold-hearted, calculated, wilful, premeditated, purposeful, purposive:
It was clearly the cool act of a professional criminal.
4 uninvolved, distant, remote, aloof, detached, removed, uninterested, unconcerned, unsympathetic, apathetic, cold, cold-hearted, cold-blooded:
How can you be so cool where human lives are concerned?
5 lukewarm, distant, uncordial, unfriendly, unsociable, unapproachable, standoffish, forbidding, unwelcoming, cold, frigid:
After the affair, she was distinctly cool towards him.
6 bold, audacious, brazen, overconfident, presumptuous, shameless, unabashed, impertinent, impudent, insolent:
I cannot account for the cool way he insulted his host.
7 coolness, chill, chilliness, Colloq coolth:
I shall have a sherry to ward off the cool of the evening.
8 aplomb, poise, sedateness, control, self-control, composure, sang-froid:
He really lost his cool when she told him he was a lousy driver.
9 chill, refrigerate, ice:
Cool the pudding before serving.
10 diminish, reduce, lessen, abate, moderate:
Her interest quickly cooled when she discovered he was married.