Cool (?), a. [Compar.Cooler (?); superl.Coolest.] [AS. cōl; akin to D. koel, G. kühl, OHG. chouli, Dan. kölig, Sw. kylig, also to AS. calan to be cold, Icel. kala. See Cold, and cf. Chill.] 1. Moderately cold; between warm and cold; lacking in warmth; producing or promoting coolness.
Fanned with cool winds.
Milton.
2. Not ardent, warm, fond, or passionate; not hasty; deliberate; exercising self-control; self-possessed; dispassionate; indifferent; as, a cool lover; a cool debater.
For a patriot, too cool.
Goldsmith.
3. Not retaining heat; light; as, a cool dress.
4. Manifesting coldness or dislike; chilling; apathetic; as, a cool manner.
5. Quietly impudent; negligent of propriety in matters of minor importance, either ignorantly or willfully; presuming and selfish; audacious; as, cool behavior.
Its cool stare of familiarity was intolerable.
Hawthorne.
6. Applied facetiously, in a vague sense, to a sum of money, commonly as if to give emphasis to the largeness of the amount.
He had lost a cool hundred.
Fielding.
Leaving a cool thousand to Mr. Matthew Pocket.
Dickens.
Syn. — Calm; dispassionate; self-possessed; composed; repulsive; frigid; alienated; impudent.