cooler

/ˈkuːl.ə(ɹ)/

adjective

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

1
Anything which cools.
2
An insulated bin or box used with ice or freezer packs to keep food or beverages cold while picnicking or camping.
3
A device for refrigerating dead bodies in a morgue.
4
A mixed drink, especially one served chilled.
“They served wine coolers in the afternoon.”
5
A prison.
6
A cold deck.
7
A bouncer or doorman.

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