Dictionary

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

Example: in the cool of the morning

A calm temperament.

The property of being cool, popular or in fashion.

Having a slightly low temperature; mildly or pleasantly cold.

Allowing or suggesting heat relief.

Example: Linen has made cool and breathable clothing for millennia.

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

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

Of a person, not showing emotion; calm and in control of oneself.

To lose heat, to get colder.

Example: 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.

Example: Relations cooled between the USA and the USSR after 1980.

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