To moderate the heat or excitement of; to allay, as
passion of any kind; to calm; to moderate.

To become less hot; to lose heat.

Quietly impudent; negligent of propriety in matters of
minor importance, either ignorantly or willfully; presuming and
selfish; audacious; as, cool behavior.

To make cool or cold; to reduce the temperature of; as,
ice cools water.

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

Not retaining heat; light; as, a cool dress.

Moderately cold; between warm and cold; lacking in
warmth; producing or promoting coolness.

s. serin; sakin, soğukkanlı. The weather is cool today. (Bugün hava serin.)

Not ardent, warm, fond, or passionate; not hasty;
deliberate; exercising self-control; self-possessed; dispassionate;
indifferent; as, a cool lover; a cool debater.

A moderate state of cold; coolness; – said of the
temperature of the air between hot and cold; as, the cool of the day;
the cool of the morning or evening.