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.
[1913 Webster]

Fanned with cool winds. Milton.
[1913 Webster]

2. Not ardent, warm, fond, or passionate; not hasty; deliberate; exercising self-control; self-possessed; dispassionate; indifferent; as, a cool lover; a cool debater.
[1913 Webster]

For a patriot, too cool. Goldsmith.
[1913 Webster]

3. Not retaining heat; light; as, a cool dress.
[1913 Webster]

4. Manifesting coldness or dislike; chilling; apathetic; as, a cool manner.
[1913 Webster]

5. Quietly impudent; negligent of propriety in matters of minor importance, either ignorantly or willfully; presuming and selfish; audacious; as, cool behavior.
[1913 Webster]

Its cool stare of familiarity was intolerable. Hawthorne.
[1913 Webster]

6. Applied facetiously, in a vague sense, to a sum of money, commonly as if to give emphasis to the largeness of the amount.
[1913 Webster]

He had lost a cool hundred. Fielding.
[1913 Webster]

Leaving a cool thousand to Mr. Matthew Pocket. Dickens.

Syn. -- Calm; dispassionate; self-possessed; composed; repulsive; frigid; alienated; impudent.
[1913 Webster]

Cool, v. t. [imp. & p. p. Cooled (?); p. pr. & vb. n. Cooling.] 1. To make cool or cold; to reduce the temperature of; as, ice cools water.
[1913 Webster]

Send Lazarus, that he may dip the tip of his finger in water, and cool my tongue. Luke xvi. 24.
[1913 Webster]

2. To moderate the heat or excitement of; to allay, as passion of any kind; to calm; to moderate.
[1913 Webster]

We have reason to cool our raging motions, our carnal stings, our unbitted lusts. Shak.
[1913 Webster]

To cool the heels, to dance attendance; to wait, as for admission to a patron's house. [Colloq.] Dryden.
[1913 Webster]