\ ˈkül How to pronounce cool (audio) \

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 intensivea 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 downA 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 downwants 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.



Definition of cool (Entry 4 of 4)

: in a casual and nonchalant manner play it cool

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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 Temperatures are cool, but dry conditions for the Southeast down into Florida. Janice Dean, Fox News, "Storm systems move inland in the West, mostly sunny skies in Georgia," 5 Jan. 2021 Quessenberry is excited about this game and that going back to Houston will be cool. Mark Heim | Mheim@al.com, al, "Titans vs. Texans live stream (1/3): How to watch NFL Week 17 online, TV, time," 3 Jan. 2021 Flying Saucer Draught Emporium in Addison: After years of serving craft beer before craft beer was cool, Flying Saucer in Addison is closing on New Year’s Eve. Sarah Blaskovich, Dallas News, "The most heart-breaking restaurant closures in Dallas in 2020," 28 Dec. 2020 Imahara, like a lot of young Americans, wanted to be cool. Reginald Dwayne Betts Kiese Makeba Laymon Carina Del Valle Schorske Dessa Irina Aleksander Sam Dolnick Mark Binelli Maggie Jones Rob Hoerburger Jamie Lauren Keiles Devin Gordon Jazmine Hughes Jenna Wortham Jade Chang Taffy Brodesser-akner Kaitlyn Greenidge Rowan Ricardo Phillips Michael Paterniti Wesley Morris Ismail Muhammad Anthony Giardina, New York Times, "Remembering some of the artists, innovators and thinkers we lost in the past year.," 23 Dec. 2020 An extended Amazons-centric opening featuring kid Diana is cool but takes too long to get the movie humming, and some iffy visual effects mar the more massive, blockbuster-ready scenes. Brian Truitt, USA TODAY, "Review: 'Wonder Woman 1984' is a rousing, retro throwback to Christopher Reeve's 'Superman'," 15 Dec. 2020 The air was cool and conditioned, and carried its own kind of quiet hush. Te-ping Chen, The Atlantic, "Shanghai Murmur," 11 Dec. 2020 Conversely, when temperatures are cool, less rain takes less carbon dioxide out of the air and the Earth warms. Ruth Defries, WSJ, "Nature’s Guide to Building Resilient Systems," 10 Dec. 2020 When the adobo is cool, pour it in a 1-gallon zip-top bag. Washington Post, "Beef birria, a rich braise with chiles and warm spices, is true comfort any way you eat it," 9 Dec. 2020 Recent Examples on the Web: Verb Remove from the oven, transfer to a rack and let cool slightly. Jessica Battilana, SFChronicle.com, "This savory meat pie is a cheery indulgence for Christmas Eve," 18 Dec. 2020 Combine butter and scallions in a bowl (let cool slightly if butter is still warm from melting). Dawn Perry, Country Living, "Scallion Cornbread," 14 Dec. 2020 Transfer the squash to a large bowl and let cool slightly. Washington Post, "Soupe joumou, a symbol of freedom and hope, is a New Year’s Day tradition for Haitians everywhere," 22 Dec. 2020 Place four of the eggs in a pan of cold water, bring to the boil and cook for exactly three minutes, remove from the heat and allow to cool in the water, peel and set aside. Richard Vines, Bloomberg.com, "Scotch Eggs Are U.K’s Hottest Snack: Here’s How to Make Them," 19 Dec. 2020 Allow to cool undisturbed until a thermometer in the syrup reads 210 degrees, about 15 minutes. ExpressNews.com, "Recipe: Chef B’s Marshmallows," 2 Dec. 2020 Slide parchment with cheese onto work surface and allow to cool for 5 minutes. Beth Segal, cleveland, "For three generations, Miceli has meant formaggio and family," 13 Nov. 2020 Remove the bowl from the oven and allow to cool before turning the larger bowl upside down. Kristin Koch, Seventeen, "13 Ridiculously Awesome DIY Gifts for Your BFFs," 9 Nov. 2020 Allow to cool completely, then chill for 30 minutes. Andrea Mandell, USA TODAY, "It's National Dessert Day! Make John Stamos' favorite gluten-free dessert at home," 14 Oct. 2020 Recent Examples on the Web: Noun When Pianon first came to work for the Sennas, the two neighbors established a habit of meeting up on Floristella’s porch in the cool of the early morning to drink powerful Sicilian coffee from Floristella’s battered pot. Andrea Lee, The New Yorker, "The Rivals," 28 Dec. 2020 But before being spirited across the border by smugglers, the teenager joined her mother in the cool of the Basilica of Guadalupe in Mexico City. New York Times, "The Epicenter," 3 Dec. 2020 Note that highs will be above average once again on Sunday with a significant cool down expected through the middle part of the week. Paul Douglas, Star Tribune, "Warm Sunday, Followed By Record Cold Highs Tuesday & Wednesday," 5 Sep. 2020 The actress, who attended the virtual show for Saint Laurent’s spring/summer 2021 collection today, remembers being captivated by the eternal cool of Catherine Deneuve in head to toe Yves. Janelle Okwodu, Vogue, "Saint Laurent Goes Virtual With Gossip Girl’s Newest Star," 15 Dec. 2020 The point here isn’t so much losing your cool - it’s sticking up for a teammates who was cheap-shotted. Dave Hyde, sun-sentinel.com, "Hyde10: Ten thoughts on Dolphins’ 19-7 win over Bengals," 6 Dec. 2020 The long nights help temperatures near the ground cool significantly, but high pressure aloft often traps a warm layer just hundreds or thousands of feet off the ground. Ian Livingston, Washington Post, "PM Update: Generally pleasant weather lasts through Friday," 10 Dec. 2020 Try to remember the cool of the eggnog sliding down your throat and the heat of the fireplace warming your back. Beth Thames | Bethmthames@gmail.com, al, "The war on COVID doesn’t mean there’s a war on Christmas," 9 Dec. 2020 There are few tools more useful in the tradition of quarterback mythmaking — that act of casting a passer as some type of John Wayne-esque alpha male who keeps his cool when the stakes are highest — than the game-winning drive. Ben Goessling, Star Tribune, "While Mahomes and Rodgers rallied, Kirk Cousins misses a chance for a clutch Vikings moment," 23 Nov. 2020 Recent Examples on the Web: Adverb Over a few minutes, a boat can be transferred from one canal to the next in a marvelous -- and cool-looking -- feat of engineering. Aj Willingham, CNN, "5 things to know for January 5: Senate runoffs, Covid, transition, Jacob Blake, Iran," 5 Jan. 2021 But conditions will quickly turn cool again on Thursday. Gary Robbins, San Diego Union-Tribune, "Weak Santa Ana winds expected Tuesday, elevating San Diego’s wildfire risk," 14 Dec. 2020 The paradigm of what is cool shifted, and Crocs are emblematic of the way young people no longer respond to traditional notions of beauty and glamour (do TikTok teens want to wear frilly frocks or dapper suits?). Max Berlinger, Los Angeles Times, "Crocs, the kicks you love to hate, are 2020’s cool shoe. Blame Bad Bunny and Bieber," 11 Dec. 2020 The crash action takes place at the unfathomably cool-sounding Rocket Sled Track at Sandia National Laboratory. Caroline Delbert, Popular Mechanics, "A Semi Truck Crashed Into a U.S. Nuclear Weapons Transporter," 19 Nov. 2020 With emotions running high for Orlando and Atlanta, Pareja said the key for the Lions is to take control of the game early and remain cool-headed through the final minutes. Julia Poe, orlandosentinel.com, "Orlando City chases win over Atlanta United, bump in standings," 27 Oct. 2020 Microsoft also offered a minor update of its cool-looking but poorly reviewed Surface X tablet, which runs Windows on a custom ARM chip instead of a typical Intel processor. Aaron Pressman, Fortune, "Microsoft offers cheapest Surface laptop yet to take on Chromebooks," 1 Oct. 2020 This one from Aerie makes a great gift, with its pretty lace material, eight color options and cool-looking strappy back. Sara Hendricks, USA TODAY, "35 gifts teenage girls actually want in 2020," 25 Sep. 2020 For all the media coverage of this cool-sounding partnership, answers are fuzzy on what the affects might be for Cowboys fans and Whataburger fans. Sarah Blaskovich, Dallas News, "Whataburger is the official burger of the Dallas Cowboys — but they’re not selling Whataburger at Cowboys games," 10 Sep. 2020

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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Learn More about cool

Time Traveler for cool

Time Traveler

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

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Statistics for cool

Last Updated

12 Jan 2021

Cite this Entry

“Cool.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cool. Accessed 22 Jan. 2021.

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More Definitions for cool

How to pronounce cool (audio)

English Language Learners Definition of cool

 (Entry 1 of 3)

: somewhat cold : not warm or hot
: made of a light, thin material that helps you stay cool
: able to think and act in a calm way : not affected by strong feelings



English Language Learners Definition of cool (Entry 2 of 3)

: to make (someone or something) cool
: to become cool : to lose heat or warmth
: to become less strong or intense especially in emotion



English Language Learners Definition of cool (Entry 3 of 3)

informal : in a calm manner : in a way that does not seem unusual or excited
\ 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.

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.

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