Definitions
1.adjectiveHaving a slightly low temperature; mildly or pleasantly cold.
2.adjectiveAllowing or suggesting heat relief."Linen has made cool and breathable clothing for millennia."
3.adjectiveOf a color, in the range of violet to green."If you have a reddish complexion, you should mainly wear cool colors."
4.adjectiveOf a person, not showing emotion; calm and in control of oneself.
5.adjectiveUnenthusiastic, lukewarm, skeptical."His proposals had a cool reception."
6.adjectiveCalmly audacious."In control as always, he came up with a cool plan."
7.adjectiveApplied facetiously to a sum of money, commonly as if to give emphasis to the largeness of the amount.
8.adjectiveOf a person, knowing what to do and how to behave; considered popular by others.
9.adjectiveIn fashion, part of or fitting the in crowd; originally hipster slang.
10.adjectiveOf an action, all right; acceptable; that does not present a problem."Is it cool if I sleep here tonight?"
11.adjectiveOf a person, not upset by circumstances that might ordinarily be upsetting."I'm completely cool with my girlfriend leaving me."
12.adjectiveQuietly impudent, defiant, or selfish; deliberately presuming: said of persons and acts.