Cool \Cool\, a. [Compar. Cooler; superl. Coolest.]

[AS. c[=o]l; akin to D. koel, G. k["u]hl, OHG. chouli, Dan. k["o]lig, 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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Cool \Cool\, n. A moderate state of cold; coolness; -- said of the temperature of the air between hot and cold; as, the cool of the day; the cool of the morning or evening.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Cool \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.

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

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

We have reason to cool our raging motions, our carnal stings, our unbitted lusts. --Shak.

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

--Dryden.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Cool \Cool\, v. i.

1. To become less hot; to lose heat.

I saw a smith stand with his hammer, thus, the whilst his iron did on the anvil cool. --Shak.

2. To lose the heat of excitement or passion; to become more moderate.

I will not give myself liberty to think, lest I should cool. --Congreve.

Source: Webster's Revised Unabridged Dictionary (1913)