- moderately cold; neither warm nor cold: a rather cool evening.
- feeling comfortably or moderately cold: I'm perfectly cool, but open the window if you feel hot.
- imparting a sensation of moderate coldness or comfortable freedom from heat: a cool breeze.
- permitting such a sensation: a cool dress.
- not excited; calm; composed; under control: to remain cool in the face of disaster.
- not hasty; deliberate: a cool and calculated action.
- lacking in interest or enthusiasm: a cool reply to an invitation.
- lacking in warmth or cordiality: a cool reception.
- calmly audacious or impudent: a cool lie.
- aloof or unresponsive; indifferent: He was cool to her passionate advances.
- unaffected by emotions; disinterested; dispassionate: She made a cool appraisal of all the issues in the dispute.
- Informal. (of a number or sum) without exaggeration or qualification: a cool million dollars.
- (of colors) with green, blue, or violet predominating.
- great; fine; excellent: a real cool comic.
- characterized by great facility; highly skilled or clever: cool maneuvers on the parallel bars.
- socially adept: It's not cool to arrive at a party too early.
- acceptable; satisfactory; okay: If you want to stay late, that's cool.
- Informal. coolly.
- (used to express acceptance): Okay, cool! I'll be there at 10:00.
- (used to express approval, admiration, etc.): He got the job? Cool!
- something that is cool; a cool part, place, time, etc.: in the cool of the evening.
- calmness; composure; poise: an executive noted for maintaining her cool under pressure.
- to become cool (sometimes followed by down or off): The soup cooled in five minutes. We cooled off in the mountain stream.
- to become less ardent, cordial, etc.; become moderate.
- to make cool; impart a sensation of coolness to.
- to lessen the ardor or intensity of; allay; calm; moderate: Disappointment cooled his early zealousness.
- cool down, to bring the body back to its normal physiological level after fast, vigorous exercise or activity by gradually slowing the pace of activity or by doing gentle exercises or stretches.
- cool off, Informal. to become calmer or more reasonable: Wait until he cools off before you talk to him again.
- cool out, Slang. to calm or settle down; relax: cooling out at the beach.
Origin of cool
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for coolest
I thought they were the coolest thing you could ever be: a rule-breaker.Jamie Lee Curtis and Naomi Foner on What It Means to Be ‘Very Good Girls’
Jamie Lee Curtis
July 25, 2014
Run Lola Run was the coolest movie ever when I was a teenager, so I was so thrilled.Diane Kruger on ‘The Bridge,’ the Immigration Problem, and Rooting For Germany in the World Cup
July 10, 2014
One of the coolest things about the class was that we were discussing the Gothic novel in real Gothic buildings.Book Bag: The Best Imaginary Castles
June 10, 2014
They believed her, and thought she was the coolest mom ever.The Drunken Downfall of Evangelical America's Favorite Painter
June 8, 2014
Check out the coolest new ideas brewing at creative crowd funding platform Kickstarter this month.Fish on Wheels, Digital Pet Babysitters, and More of the Summer’s Best Kickstarters
May 29, 2014
On the other hand Walling was to all appearance the coolest man in the room.
A week ago I should have said that was the coolest head of the lot.Peak and Prairie
If Glen is a captive use your coolest judgment about interfering.The Boy Scout Treasure Hunters
Charles Henry Lerrigo
Knight was at once the most ardent and the coolest man alive.A Pair of Blue Eyes
"He is the best sportsman who has the coolest head," replied I, sleepily.Dross
Henry Seton Merriman
- moderately colda cool day
- comfortably free of heata cool room
- producing a pleasant feeling of coldnessa cool shirt
- able to conceal emotion; calma cool head
- lacking in enthusiasm, affection, cordiality, etca cool welcome
- calmly audacious or impudent
- informal (esp of numbers, sums of money, etc) without exaggeration; actuala cool ten thousand
- (of a colour) having violet, blue, or green predominating; cold
- (of jazz) characteristic of the late 1940s and early 1950s, economical and rhythmically relaxed
- informal sophisticated or elegant, esp in an unruffled way
- informal excellent; marvellous
- not standard in a cool manner; coolly
- coolnessthe cool of the evening
- slang calmness; composure (esp in the phrases keep or lose one's cool)
- slang unruffled elegance or sophistication
- (usually foll by down or off) to make or become cooler
- (usually foll by down or off) to lessen the intensity of (anger or excitement) or (of anger or excitement) to become less intense; calm down
- cool it (usually imperative) slang to calm down; take it easy
- cool one's heels to wait or be kept waiting
Word Origin and History for coolest
Old English col "not warm" (but usually not as severe as cold), also, of persons, "unperturbed, undemonstrative," from Proto-Germanic *koluz (cf. Middle Dutch coel, Dutch koel, Old High German kuoli, German kühl "cool," Old Norse kala "be cold"), from PIE root *gel- "cold, to freeze" (see cold (adj.)).
Applied since 1728 to large sums of money to give emphasis to amount. Meaning "calmly audacious" is from 1825. Slang use for "fashionable" is 1933, originally Black English; modern use as a general term of approval is from late 1940s, probably from bop talk and originally in reference to a style of jazz; said to have been popularized in jazz circles by tenor saxophonist Lester Young. Related: Coolly.
c.1400, "coldness, coolness," from cool (adj.). Meaning "one's self-control, composure" (the thing you either keep or lose) is from 1966.
Old English colian, "to lose warmth," also figuratively, "to lose ardor," from the root of cool (adj.). Meaning "to cause to lose warmth" is from late 14c. Related: Cooled; cooling.