coolness

From Middle English colnes, colnesse, from Old English cōlnes, cœ̄lnes, cēlnes (“coolness; cool air, breeze”), from Proto-West Germanic *kōlinassī, equivalent to cool +‎ -ness. Cognate with Middle High German kuolnisse, küelnisse (“cooling, coolness”).

• IPA^(key): /ˈkuːlnəs/
• Hyphenation: cool‧ness

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coolness (usually uncountable, plural coolnesses)

1. (uncountable) The state of being cool, i.e. chilly.
2. (countable) The result or product of being cool, i.e. chilly.
3. (uncountable) The state of being cool, i.e. calm.
   • 2018 June 18, Phil McNulty, “Tunisia 1 – 2 England”, in BBC Sport‎, archived from the original on 21 April 2019:

     Luckily for England, they have a world-class striker with a golden touch in [Harry] Kane, who was coolness personified to carefully direct in the winner.

4. Indifference; lack of passion or interest.
5. (slang, uncountable) The state of being cool, i.e. good or pleasing.
6. (slang, countable) The result or product of being cool, i.e. good or pleasing. (Can we add an example for this sense?)

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