\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.

\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.

\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.

\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.