\ 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 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

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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 The agent asked what total price Jackson would be cool with for carrying out the hit. Tresa Baldas, Detroit Free Press, "Feds: Man hires hitman to kill ex-girlfriend, then calls himself a 'good dude'," 7 May 2021 Temperatures will not be that cool with this upcoming system holding at around 60 degrees on Monday afternoon., "Here comes a bright and sunny Mother’s Day," 7 May 2021 The president has been cool to the expansion idea as well. New York Times, "G.O.P. Focuses on Polarizing Cultural Issues in Drive to Regain Power," 7 May 2021 Showers will continue in most areas, and temperatures will be cool with the high only reaching about 61 degrees. oregonlive, "Portland metro Friday weather: Showers continue, slight chance of thunder; high 61," 7 May 2021 Instead, the star was unusually cool prior to the explosion. Ashley Strickland, CNN, "'Oddball supernova' reveals star's death throes before exploding," 5 May 2021 Papa’s despicably controlling treatment of his fourth and final wife, who is also named Mary, and that was not exactly cool. Los Angeles Times, "Column: My Apple Watch just dumped me. Should we get back together?," 4 May 2021 Meanwhile, folks west of the Rockies will be a bit cool for early May with highs running below average. Todd Nelson, Star Tribune, "Sunday Thundershowers. Cool First Full Week of May," 1 May 2021 Plus-size queens often lean on one or two silhouettes, but Maxi shows off three different ones in this episode, and all of them are cool as hell. Shaad D'souza, Vulture, "RuPaul’s Drag Race Down Under Series-Premiere Recap: Hey, Koala Girl!," 1 May 2021 Recent Examples on the Web: Verb Set aside to cool for about 30 minutes or refrigerate for 10 to 15 minutes. Joanne Rosa, ABC News, "How to make Duff Goldman's no-bake s'mores cereal treats," 30 Apr. 2021 Set aside 2 cups of cooked rice on a plate to cool completely then transfer to the refrigerator until ready to use in the Paella Fried Rice. Ben Mims, Los Angeles Times, "Everything you need to buy and prepare for food blogger Jonathan Melendez’s ‘Week of Meals’ recipes," 29 Apr. 2021 Stir in crème de Cassis, if using; set aside to cool. Kim Sunée, Anchorage Daily News, "This layered rhubarb dessert goes perfectly with sunny spring afternoons," 22 Apr. 2021 Loosely wrap the corn in parchment or slightly dampened paper towels and microwave on high for 2 minutes; set aside to cool. Paul Stephen, San Antonio Express-News, "Recipe: Cantaloupe and Green Tomato Salad," 22 Apr. 2021 Remove from heat, stir in mint leaves and set aside to cool for at least 1 hour. Katie Kelly Bell, Forbes, "Try These Low Alcohol, Clean Cocktail Recipes For Spring And Summer," 12 Mar. 2021 To finish: Using a slotted spoon, transfer the chicken to a plate and set aside to cool slightly. Tribune News Service, cleveland, "Four chicken soup recipes to soothe the soul this winter," 20 Jan. 2021 Tip into a bowl and set aside for about 20 minutes to cool. Janelle Bitker,, "The best cookbooks of 2020," 2 Dec. 2020 Set aside to cool then pour into a glass jar if not using right away. Milwaukee Journal Sentinel, "Lebanese attavef with walnuts recipe," 1 Dec. 2020 Recent Examples on the Web: Noun Kluber, the AL Cy Young winner in 2014 and 2017, was not nearly as sharp on the cool and at times rainy afternoon. Ronald Bum,, "Yankees rally past Nationals 4-3 in 11th, Scherzer strikes out 14," 8 May 2021 Unlike his character, who strides around in long, double-faced wool red, cream and black trench coats, red pants and cashmere cardigans, the actor dresses in daily life with casual cool. New York Times, "Ewan McGregor: Dahling, He’s Halston!," 7 May 2021 Winny, Harry’s wife, said that her husband never lost his professional cool and was calm even during the most heated traffic jams., "Debris from Indonesian submarine is found, ending hopes of rescue," 24 Apr. 2021 Its music reflects some urban cool, too — also danger and excitement, for the protagonist is a private eye. Jay Nordlinger, National Review, "Great TV Theme Music," 19 Apr. 2021 The overhead life-style-tableaux shot that became the dominant Instagram cliché presented a vibe: the arid cool of sunlight, marble, and cappuccino. Kyle Chayka, The New Yorker, "TikTok and the Vibes Revival," 26 Apr. 2021 Located in the Santa Monica Mountains, the Saddle Peak House is what California cool is all about. Stacey Leasca, Travel + Leisure, "Live the California Dream at This Stunning Rental House With Epic Views of the Pacific Ocean," 11 Apr. 2021 Spotty showers could linger into early Wednesday, but the more significant weather impact will be the sharp cool-down. Dallas News, "Cold front Tuesday night," 29 Mar. 2021 Some people might feel nervous at the thought of being the first to hurtle through space in a relatively unproven vehicle, but Behnken and Hurley act cool as cucumbers. Charlie Wood, Popular Science, "Watch live as NASA and SpaceX team up for a historic crewed launch," 27 May 2020 Recent Examples on the Web: Adverb See more cool-looking fire pits and fire tables such as the Prism Hardscapes Tavola VI gas fire table made of glass fiber reinforced cement at Woodland Direct. oregonlive, "Modern outdoor living spaces: 10 must-have sleek accessories for a balcony, deck or backyard," 4 May 2021 The founder of the agency bought it, lofted it for some cool-looking meeting spaces, and moved in his people. David Rock, Forbes, "Your Culture Was Never Your Building, But Now It Definitely Isn’t," 26 Apr. 2021 China's Civil Affairs Bureau has made clear the new cool-off period would not apply to divorce lawsuits that involve domestic violence. NBC News, "Frustration among women in China as new divorce law stalls process," 27 Mar. 2021 But that doesn’t mean there aren’t some cool-looking campers out there. Bryan Hood, Robb Report, "This Land Rover Defender Camper Conversion Will Bring Rugged and Retro Style to the Campground," 26 Mar. 2021 On stage, SiR was cool personified, taking a few hits of some smoke handed to him by a fan, and singing effortlessly. Hank Shteamer, Rolling Stone, "Our Last Shows: ‘Rolling Stone’ Staffers Look Back at Their Final Concerts Before the World Went Quiet," 10 Mar. 2021 On top of being easy to adjust on the fly, the StreamCam is also the clear winner in the looks department (if having a cool-looking webcam matters to you, at least). Michael Andronico, CNN Underscored, "The best webcams of 2021," 4 Mar. 2021 With plants as the space’s backdrop—including cool-looking and unique species like Begonia maculata, Philodendron Birkin and Maranta Lemon Lime—customers invariably end up wanting to take one home. Metanoya Z. Webb, Essence, "Come To Their Oakland Shop For The Plants, But Stay For The Sanctuary and Peace," 4 Mar. 2021 Canon’s camera, however, ran into some early issues with heat reducing the overall usefulness of 8K capture—the body would require long cool-down times after short recording sessions to prevent damaging the electronics. Popular Science, "Sony’s pro-grade Alpha 1 is the first in a whole new category of cameras," 26 Jan. 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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Statistics for cool

Last Updated

12 May 2021

Cite this Entry

“Cool.” Dictionary, Merriam-Webster, Accessed 17 May. 2021.

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More Definitions for cool



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.

More from Merriam-Webster on cool

Thesaurus: All synonyms and antonyms for cool

Nglish: Translation of cool for Spanish Speakers

Britannica English: Translation of cool for Arabic Speakers

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