\ 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 coolish (audio) \ adjective
coolly or less commonly cooly \ ˈkü(l)-​lē How to pronounce cooly (audio) \ adverb
coolness \ ˈkül-​nəs How to pronounce coolness (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 Remove to a rack to cool, then store in an airtight container for up to 1 week — or less, if humidity is high. cleveland, "Homemade crackers: Who needs a box?," 25 June 2020 Transfer the mixture to a serving bowl and then chill it for at least an hour, or until it’s cool. Dana Holmes, CNN Underscored, "Everything you need to make Funfetti dip at home," 25 June 2020 There are basically cool weather herbs and summer herbs. Calvin Finch, ExpressNews.com, "Calvin Finch: Beginner’s guide to growing herbs," 25 June 2020 Poonsi Kraikittikun takes a stroll under the cool canopy of trees at Fern Dell. Lisa Boone, Los Angeles Times, "The 15 best places in L.A. to find shade on hot summer days," 24 June 2020 The ugly-cool clogs—which have over 31,600 reviews on Amazon alone—come in a rainbow of colors and patterns, including neon hues, pretty pastels, and even tie-dye. Amanda Tarlton, USA TODAY, "13 Amazon deals on summer 2020’s trendiest shoes: Crocs, Adidas, and more," 24 June 2020 The cool red dwarf star is only around 20 million to 30 million years old, which is very young compared to our sun, which is 150 times older. Ashley Strickland, CNN, "Neptune-size exoplanet found zooming around nearby young star," 24 June 2020 Illuminate your garage, patio, or back deck in cool, contemporary style with this one-light outdoor wall sconce. Mark Heim | Mheim@al.com, al, "Outdoor furniture sale offers up to 50 percent off deals on sectionals, patio umbrellas, lighting," 24 June 2020 But infielders are encouraged not to throw the ball around, another cool tradition that’s being wiped out in 2020. John Shea, SFChronicle.com, "No Buster hugs or sharing doughnuts: 20 odd protocols for baseball in 2020," 24 June 2020 Recent Examples on the Web: Verb Take the gratin out of the broiler and let cool for 5 minutes. Christian Reynoso, SFChronicle.com, "Cooking with legendary Bay Area drag queen helped me see beauty in community," 25 June 2020 This colorful inflatable pool is a great vessel for kids—or you—to cool off in. Sara Hendricks, USA TODAY, "15 products to help you relive your childhood summers," 25 June 2020 At the same time, the area around Antarctica began to cool down. Chelsea Harvey, Scientific American, "Declining Antarctic Sea Ice Could Disrupt a Major Carbon Sink," 24 June 2020 Those whose temperature exceeds 100.4 degrees Fahrenheit will be directed to a tent and afforded an opportunity to cool down before being retested. Tim Sullivan, The Courier-Journal, "Louisville City FC's stadium launch could attract a national audience," 24 June 2020 The open windows helped cool the car but not enough to stop our fussing. Beth Thames | Bethmthames@gmail.com, al, "Who owns the ocean?," 24 June 2020 Remove lid, transfer to medium bowl and allow to cool. Beth Segal, cleveland, "Veggies galore: The joy of meatless meals," 23 June 2020 And smoke from a string of wildfires in Siberia has not helped temperatures cool down. Cailey Rizzo, Travel + Leisure, "Siberian Town Near Arctic Circle Reports Record-breaking 100.4 Degree Day (Video)," 23 June 2020 Bethany Hawk, 12, stood eating free ice cream provided to help people cool off in the sun. oregonlive, "Youth create art, march Friday for Don’t Shoot Portland Juneteenth celebration," 19 June 2020 Recent Examples on the Web: Noun Keeping such potent internal hardware cool is no mean feat, even in a plus-sized laptop like the Helios 700. Brad Chacos, PCWorld, "Acer overhauls Predator gaming laptops with 10th-gen CPUs, RTX Super GPUs, and ultra-fast displays," 23 June 2020 Now is not the time to lose your cool over a long wait for your burger or beer. oregonlive, "Portland restaurants and bars can reopen Friday: Here are five things you need to know," 18 June 2020 After six minutes, transfer the eggs to an ice bath to let cool completely — at least 15 minutes. Dallas News, "Potato salad celebration: 4 recipes for your next socially-distanced picnic," 17 June 2020 Here are a few tips for keeping your cool in a potentially fiery environment. Sara Kiley Watson, Popular Science, "Essential first aid tips for protesters," 5 June 2020 Too many bowhunters lose their cool in this moment and just bury their pins on the whole turkey. Tony J. Peterson, Outdoor Life, "7 Tips for Bowhunting Turkeys this Spring," 9 Apr. 2020 Trying to connect with those who actively oppose your views is a good way to lose your cool (pun intended), but listening is a good place to start. Samantha Boardman, Marie Claire, "How to Conduct Healthy Conversations Around Climate Change," 2 Apr. 2020 If their kids grow up thinking that a man who beats his girlfriend is super cool, well, that’s fine. Jennifer Wright, Harper's BAZAAR, "Men "Brought Down" by the #MeToo Movement Are Back," 15 Aug. 2018 Walker's line is bold and geometric while Rag & Bone's offering is more classic cool. Megan Gustashaw, GQ, "Your 2018 Sunglasses Shopping Guide," 28 Mar. 2018 Recent Examples on the Web: Adverb His East Dallas shop, which opened in 2010, is the granddad of artisan doughnuts in D-FW and helped make wacky doughnuts cool here. Sarah Blaskovich, Dallas News, "8 delicious doughnut shops in Dallas-Fort Worth on National Donut Day, June 5," 4 June 2020 Here, a pro pet stylist shares his best tips for keeping your dog cool all summer long. Grace Haynes, Southern Living, "Brush Up on Healthy Dog-Grooming Practices," 29 May 2020 Let cool slightly then chill, covered with plastic wrap, at least 3 hours. Taylor Murray, Country Living, "Fruit and Nut Trifle," 30 Oct. 2019 Let cool just slightly and serve warm or at room temperature. Kim Sunée, Anchorage Daily News, "Caramelized kimchi breadsticks are an absolute crowd pleaser," 20 Dec. 2019 Let cool slightly before serving as is, or with a dollop of Greek yogurt. Ellie Krieger, The Denver Post, "Roasting fall fruit deepens their flavor and nourishes the senses," 1 Oct. 2019 Let cool completely, then pulverize in a food processor until finely ground. Nancy Stohs, Milwaukee Journal Sentinel, "14 Holiday Cookie Contest winning recipes, ahead of this year's Dec. 4 reveal," 29 Nov. 2019 Let cool completely, about 30 minutes, then break into individual cookies. Woman's Day Kitchen, Woman's Day, "Evan Rachel Wood’s Gluten-Free Shortbread," 21 Nov. 2019 Transfer to cutting board; let cool before slicing. The Good Housekeeping Test Kitchen, Good Housekeeping, "Chicken, Sausage and White Bean Stew," 21 Dec. 2019

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

28 Jun 2020

Cite this Entry

“Cool.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cool. Accessed 6 Jul. 2020.

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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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More from Merriam-Webster on cool

Thesaurus: All synonyms and antonyms for cool

Rhyming Dictionary: Words that rhyme with cool

Spanish Central: Translation of cool

Nglish: Translation of cool for Spanish Speakers

Britannica English: Translation of cool for Arabic Speakers

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