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Added 1 October 2026

cool

/kuːl/ adjective

In Latin: frigidulus Wiktionary

adjective Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about cool at Wordnik → Where our words come from →

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.

noun

A moderate or refreshing state of cold; moderate temperature of the air between hot and cold; coolness.
in the cool of the morning
A calm temperament.
The property of being cool, popular or in fashion.

verb

To lose heat, to get colder.
I like to let my tea cool before drinking it so I don't burn my tongue.
To make cooler, less warm.
To become less intense, e.g. less amicable or passionate.
Relations cooled between the USA and the USSR after 1980.

noun

A measure of butter, usually around 40lb; a container holding such an amount of butter. .mw-parser-output .defdate{font-size:smaller}

Origin

From Middle English cool, from Old English cōl (“cool, cold, tranquil, calm”), from Proto-West Germanic *kōl(ī), from Proto-Germanic *kōluz (“cool”), from *kalaną (“to be cold, to freeze”), Proto-Indo-European *gel- (“to be cold, to freeze”).

From Wiktionary, via Kaikki.org (CC BY-SA)

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