\ ˈkül How to pronounce cool (audio) \

Essential Meaning of cool

1 : somewhat cold : not warm or hot a cool breeze The weather is cool today. See More ExamplesThe surface is cool to the touch. The plant grows best in cool climates. I'm feeling a little cool. a cool refreshing drink It's cooler [=less warm or hot] in the shade. This is the coolest [=least warm or hot] summer on record.Hide
2 : made of a light, thin material that helps you stay cool We changed into some cooler clothes.
3 : able to think and act in a calm way : not affected by strong feelings It is important to keep a cool head in a crisis. = It is important to keep/stay cool in a crisis. [=it is important to remain calm in a crisis] She remained calm, cool, and collected. He is a cool customer. [=he is someone who remains calm and is not easily upset]

Full Definition of cool

 (Entry 1 of 4)

1 : moderately cold : lacking in warmth The plant grows best in cool climates.
2a : marked by steady dispassionate calmness and self-control a cool and calculating businessperson
b : lacking ardor or friendliness a cool impersonal manner
c of jazz : marked by restrained emotion and the frequent use of counterpoint
d : free from tensions or violence We used to fight, but we're cool now.
3 used as an intensive a cool million dollars
4 : marked by deliberate effrontery or lack of due respect or discretion a cool reply
5 : facilitating or suggesting relief from heat a cool dress
6a of a color : producing an impression of being cool specifically : of a hue in the range violet through blue to green
b of a musical tone : relatively lacking in timbre or resonance (see resonance sense 2a)
7 informal
a : very good : excellent That was a really cool movie. also : all right Is getting together Friday night cool with you?
b : fashionable, hip … not happy with the new shoes … because they were not "cool."— Celestine Sibley


cooled; cooling; cools

Definition of cool (Entry 2 of 4)

intransitive verb

1 : to become cool : lose heat or warmth placed the pie in the window to cool sometimes used with off or down
2 : to lose ardor or passion His anger cooled.

transitive verb

1 : to make cool : impart a feeling of coolness to cooled the room with a fan often used with off or down A swim cooled us off a little.
2a : to moderate the heat, excitement, or force of : calm cooled her growing anger
b : to slow or lessen the growth or activity of usually used with off or down wants to cool off the economy without freezing itNewsweek
cool it
: to calm down : go easy The word went out to the young to cool it.— W. M. Young
cool one's heels
: to wait or be kept waiting for a long time especially from or as if from disdain or discourtesy



Definition of cool (Entry 3 of 4)

1 : a cool time, place, or situation the cool of the evening
2a : absence of excitement or emotional involvement : detachment … must surrender his fine cool and enter the closed crazy world of suicide …— Wilfrid Sheed
b : poise, composure The player lost his cool and began yelling at the referee.
3 : hipness



Definition of cool (Entry 4 of 4)

: in a casual and nonchalant manner play it cool

Other Words from cool


coolish \ ˈkü-​lish How to pronounce cool (audio) \ adjective
coolly or less commonly cooly \ ˈkü(l)-​lē How to pronounce cool (audio) \ adverb
coolness \ ˈkül-​nəs How to pronounce cool (audio) \ noun

Choose the Right Synonym for cool


cool, composed, collected, unruffled, imperturbable, nonchalant mean free from agitation or excitement. cool may imply calmness, deliberateness, or dispassionateness. kept a cool head composed implies freedom from agitation as a result of self-discipline or a sedate disposition. the composed pianist gave a flawless concert collected implies a concentration of mind that eliminates distractions especially in moments of crisis. the nurse stayed calm and collected unruffled suggests apparent serenity and poise in the face of setbacks or in the midst of excitement. harried but unruffled imperturbable implies coolness or assurance even under severe provocation. the speaker remained imperturbable despite the heckling nonchalant stresses an easy coolness of manner or casualness that suggests indifference or unconcern. a nonchalant driver

Examples of cool in a Sentence

Adjective The weather is cool today. The surface is cool to the touch. The plant grows best in cool climates. I'm feeling a little cool. We changed into some cooler clothes. She remained calm, cool, and collected. Verb The fan cools the engine. the cooling effect of the breeze Allow the cake to cool before slicing. the cooling of the ocean waters I took a break from the discussion to allow my anger to cool. His interest in her has cooled somewhat. Noun the judge's customary cool stood him in good stead during the sensational trial I envy you your cool. Adverb Here comes Mom. Act cool and she won't suspect a thing.
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Recent Examples on the Web: Adjective Gucci bag in the game Roblox isn’t cool, because it can’t be taken out of that game. Michael Taylor, San Antonio Express-News, 17 Nov. 2021 In short, AirPods have become too widespread to be cool. Rory Satran, WSJ, 13 Nov. 2021 Bird and Buckner were safely out of earshot and everything was cool., 9 Nov. 2021 Today, the emerging view seems to be that crypto is cool — something not even the truest believers would have argued until recently. New York Times, 5 Nov. 2021 The hottest time of day is generally 1-4 p.m., but the mornings will still be cool, according to Rogers. Mackenzie Brower, The Arizona Republic, 4 Nov. 2021 While esports was cool before the pandemic, the rise of people kept indoors with no other live sports to watch had accelerated its popularity. Kori Hale, Forbes, 3 Nov. 2021 The new bosses introduced in the game are also cool and add to the franchise’s ever-growing list of sci-fi baddies. Jason Hidalgo, USA TODAY, 31 Oct. 2021 Once cranberry mixture is cool, discard orange zest and thyme sprigs and transfer mixture to a blender. Charlyne Mattox, Country Living, 12 Oct. 2021 Recent Examples on the Web: Verb After an hour, remove the turkey pieces and set aside to cool. Tribune News Service, cleveland, 15 Nov. 2021 Remove the hot skillets from the oven and place on a cooling rack to cool slightly. Joanne Rosa, ABC News, 3 Nov. 2021 Using electric mixer on low speed, beat 1 minute to cool slightly. Karen Tack, Good Housekeeping, 21 Oct. 2021 Remove from the oven (keep the oven on), and set aside to cool. Washington Post, 14 Oct. 2021 Bring to a boil, then reduce to a simmer and cook, stirring often, until cranberries burst and liquid is thickened, 20 to 25 minutes; cool slightly. Charlyne Mattox, Country Living, 12 Oct. 2021 In Northern California, the weather is expected to cool slightly and the humidity to rise starting on Tuesday. Sam Metz,, 7 Sep. 2021 In Northern California, the weather is expected to cool slightly and the humidity to rise starting on Tuesday. Sam Metz, ajc, 7 Sep. 2021 The fires have been concentrated in Northern California, where the weather is expected to cool slightly and the humidity to rise starting Tuesday. Sam Metz, Anchorage Daily News, 6 Sep. 2021 Recent Examples on the Web: Noun The downtown-dive atmosphere, dressed up enough to keep the designers and magazine editors from running away in fear, brought old-fashioned Warholian cool back to Manhattan, against the odds. New York Times, 28 Dec. 2020 Jonathan Majors and Idris Elba have saddled up to make the Western cool again. Brian Truitt, USA TODAY, 2 Nov. 2021 Unless and until Stuttgart achieves parity with Tesla on battery technology (cost and range), Porsche’s electric offerings will have to trade on their stellar looks, their contrarian cool, their Euro-funkitude. Dan Neil, WSJ, 14 Oct. 2021 Unlike herds of cows and sheep, camels can go 100 miles without water and can maintain their cool in temperatures upwards of 120 degrees Fahrenheit. Adeline Chen, CNN, 18 Oct. 2021 Though Ian Fleming created 007 in the 1953 novel Casino Royale, Bond was born for the movies, with Connery defining his debonair secret-agent cool in the 1962 thriller Dr. No. Rob Sheffield, Rolling Stone, 2 Oct. 2021 Their act played off these contrasts, with Martin trying to get through a song or a bit and Lewis constantly interrupting and exasperating him, doing a medley of voices, imitations and emotions while Martin tried to maintain his considerable cool. Tevi Troy, WSJ, 25 July 2021 Where Roeg maintains his cool, however, assembling the components of his mystery with a watchmaker’s care, Żuławski unleashes hell. Anthony Lane, The New Yorker, 1 Oct. 2021 The best the Bears could say was that Fields absorbed the loss without losing his cool. Doug Lesmerises, cleveland, 27 Sep. 2021 Recent Examples on the Web: Adverb From the cool-toned color story of the packaging to the ingredients, the brand makes comfort and relaxation a top priority. Sara Miranda, Allure, 21 Oct. 2021 Brands like Anastasia Beverly Hills, Morphe, Huda Beauty, and MAC have all touted the regal hue, often pairing the cool-toned shade with soft neutrals that make experimenting easier than ever. Allure, 12 Oct. 2021 Kidman also wore Glossier's Cloud Paint in 'Puff' in the show, so pull that cool-toned pink blush shade out from your makeup collection. Julia Marzovilla, Marie Claire, 23 Sep. 2021 The formula isn't too creamy or too dry, and features shades in both the warm- and cool-toned family, even making a fit for hard-to-match redheads. Rachel Nussbaum,, 13 Sep. 2021 Remove the can with tongs, place on a wire rack and let cool before opening. San Diego Union-Tribune, 15 Sep. 2021 Transfer pie to a wire rack and let cool before serving. Lyda Jones Burnette, Country Living, 11 Aug. 2021 The Next Generation and Captain Jean-Luc Picard—stately, cool-headed, the guy who gets things done. Lauren Smiley, Wired, 22 June 2021 That’s not the only cool-looking anime to hit Netflix in March. Erik Kain, Forbes, 24 Feb. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cool.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cool


before the 12th century, in the meaning defined at sense 1


before the 12th century, in the meaning defined at intransitive sense 1


15th century, in the meaning defined at sense 1


1968, in the meaning defined above

History and Etymology for cool


Middle English col, going back to Old English cōl, going back to West Germanic *kōlu- (whence also Middle Dutch coele "moderately cold" and, from a variant *kōlja-, Old High German kuoli), lengthened-grade derivative from the base of *kalan- "to be cold" — more at cold entry 1


Middle English colen, going back to Old English cōlian, verbal derivative from Germanic *kōl- cool entry 1 (whence also Old Saxon colon "to become cool," Old High German kuolēn)


Middle English cole, derivative of col cool entry 1


derivative of cool entry 1

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Time Traveler for cool

Time Traveler

The first known use of cool was before the 12th century

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Dictionary Entries Near cool

cook wrasse



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Statistics for cool

Last Updated

20 Nov 2021

Cite this Entry

“Cool.” Dictionary, Merriam-Webster, Accessed 30 Nov. 2021.

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More Definitions for cool


\ ˈkül How to pronounce cool (audio) \
cooler; coolest

Kids Definition of cool

 (Entry 1 of 3)

1 : somewhat cold : not warm a cool day a cool room
2 : not letting or keeping in heat cool clothes
3 : calm entry 3 sense 2 She is cool in a crisis.
4 : not interested or friendly He was cool to my idea.
5 : fashionable, stylish, or attractive in a way that is widely approved of
6 : very good excellent

Other Words from cool

coolly adverb
coolness noun


cooled; cooling

Kids Definition of cool (Entry 2 of 3)

: to make or become less warm



Kids Definition of cool (Entry 3 of 3)

1 : a time or place that is not warm the cool of the evening
2 : a calm state of mind Keep your cool.


intransitive verb

Legal Definition of cool

: to lose passion : become calm sometimes used with off or down the time elapsing…is such that a reasonable man thus provoked would have cooled— W. R. LaFave and A. W. Scott, Jr.

More from Merriam-Webster on cool

Nglish: Translation of cool for Spanish Speakers

Britannica English: Translation of cool for Arabic Speakers


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