cool

IPA: kˈuɫ

A moderate or refreshing state of cold; moderate temperature of the air between hot and cold; coolness.
A calm temperament.
The property of being cool, popular or in fashion.
A surname.
(programming) Initialism of CLIPS Object-Oriented Language.
Ellipsis of McCool.; A surname from Irish, anglicized form of McCool. [A surname from Irish.]

(intransitive, literally) To lose heat, to get colder.
(transitive, literally) To make cooler, less warm.
(intransitive, figuratively) To become less intense, e.g. less amicable or passionate.
(transitive, figuratively) To make less intense, e.g. less amicable or passionate.
(transitive, slang, dated) To kill, murder.
(intransitive, African-American Vernacular, slang) To relax, hang out.

Of a mildly low temperature.
Allowing or suggesting heat relief.
Of a color, in the range of violet to green.
(of a person) Not showing emotion; calm and in control of oneself.
Unenthusiastic, lukewarm, skeptical.
Calmly audacious.
Applied facetiously to a sum of money, commonly as if to give emphasis to the largeness of the amount.
(informal) Of a person, knowing what to do and how to behave; behaving with effortless and enviable style and panache; considered popular by others.
(informal, originally hipster slang) Fashionable; trendy and hip.
(informal) All right; acceptable.
(informal) Very interesting or exciting.
(informal) (followed by with) Able to tolerate; to be fine with.
(informal) (of a pair of people) Having good relations.

Examples of "cool" in Sentences

The air on the top was cool and fresh.
Transpiration cools the air due to evaporation.
Birds are softly chirping in the cool mountain air.
Cistern water evaporated, cooling the air in the building.
The idea was to catch air and cool the neck of the soldier.
She turned to face him, her expression cool and unreadable.
He winced; God, how many times was he going to use the word cool?
The resulting cool wet air is then passed through a desiccant bed.
A refrigeration unit is included for cooling the inlet air to the cooler.
This rapidly cools the air, and the various constituents quickly liquefy.
The cool ground produces condensation in the nearby air by heat conduction.
The air chamber in the pipe has a cooling and mellowing effect on the smoke.
The deficit is worth a reference; it is for what they call a cool sum, Frank.
More than a few Democratic politicians use the term cool or cold to describe the president.
Sebastian stood there, his expression cool and gloating, his arms outstretched, his fingers almost touching the tunnel walls.
And the French use the word cool, which is no longer really used that much in England, so I sound like some sort of 70s throwback...
Caroline Lubbers has always devoted a great deal of time and energy to finding what she calls cool presents for her marketing firm's clients.