cool

Of a mildly low temperature.

• I like cool weather the most 'cause it's not too hot to wear a jacket but I won't be too cold in my shorts.

Allowing or suggesting heat relief.

• Linen has made cool and breathable clothing for millennia.

Of a color, in the range of violet to green.

• If you have a reddish complexion, you should mainly wear cool colors.

Not showing emotion; calm and in control of oneself.

• Be cool. There's no need to panic.

Unenthusiastic; lukewarm; skeptical.

• His proposals had a cool reception.

Calmly audacious.obsolete

• Its cool stare of familiarity was intolerable.
• In that supposed event, you say, you will destroy the Union; and then, you say, the great crime of having destroyed it will be upon us! That is cool.

Applied facetiously to a sum of money, commonly as if to give emphasis to the largeness of the amount.

• Who will lend me a cool hundred.
• But she had wrote out a little coddleshell in her own hand a day or two afore the accident, leaving a cool four thousand to Mr. Matthew Pocket.

Knowing what to do and how to behave; behaving with effortless and enviable style and panache; considered popular by others.informal

• Maggie the au pair, and Pam P. on the school bus and Billy G. with his Grateful Dead records were all deeply cool people. But they weren’t cool because they smoked. They smoked because they were cool.
• He managed to conduct interviews with the least cool global figure – his father, Prince Charles – and the most cool, Barack Obama, in a way that allowed them both to look as good as they could.

Fashionable; trendy; hip.informal

• 2008, Lou Schuler, "Foreward", in Nate Green, Built for Show, page xii The fact that I was middle-aged, bald, married, and raising girls instead of chasing them didn't really bother me. Muscles are cool at any age.

All right; acceptable; good.informal

• Is it cool if I sleep here tonight?

A moderate or refreshing state of cold; moderate temperature of the air between hot and cold; coolness.uncountable

• in the cool of the morning

A calm temperament.uncountable

The property of being cool, popular or in fashion.uncountable

To lose heat, to get colder.intransitiveliterally

• I like to let my tea cool before drinking it so I don't burn my tongue.

To make cooler, less warm.literallytransitive

• Send Lazarus, that he may dip the tip of his finger in water, and cool my tongue.

To become less intense, e.g. less amicable or passionate.figurativelyintransitive

• Relations cooled between the USA and the USSR after 1980.

To make less intense, e.g. less amicable or passionate.figurativelytransitive

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

To kill, murder.datedslangtransitive

• Maybe he would die. That would mean I had murdered him. I smiled, trying the idea on for size. One of the things that always had cheesed me a little was that I had no kills to my credit. I'd been in plenty of rumbles, but somehow, I'd never

To relax, hang out.intransitiveslang

• Seen my homeboys coolin' way way out / Told 'em bout my mornin' cold bugged' em out
• "What up, kid?" ¶ "Coolin'."

A measure of butter, usually around 40lb; a container holding such an amount of butter.Irelandarchaic

• Father Conmee saluted Mr William Gallagher and perceived the odours that came from baconflitches and ample cools of butter.