\ 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 The county’s weather continues to be cool; San Diego hasn’t reached 70 degrees since Nov. 29. Gary Robbins, San Diego Union-Tribune, 8 Jan. 2022 The clothes, concept, and props like the sword were just so cool. Sarah Han, Allure, 19 Dec. 2021 Once the cookies are cool, place in tins, lined with parchment or waxed paper. Anne Byrn, USA TODAY, 16 Dec. 2021 Delvac: — and having that passion of creation, that kind of closeness with the audience is a really up-close and intense experience that’s also super-cool. Nicholas Quah, Vulture, 14 Dec. 2021 Rice will be rembered for being the first to popularly suggest that vampires are cool or, at least, cooler than your ex-boyfriend mugging around in a black cape and plastic fangs. Washington Post, 13 Dec. 2021 The other thing that was so cool was to see so many people showing solidarity on Twitter. Courtney Shea,, 6 Dec. 2021 Basketball is cool, but everybody talks about that. Ron Kroichick, San Francisco Chronicle, 6 Dec. 2021 Temps will be cool, and the snow level will dip to about 1,500 feet. oregonlive, 3 Dec. 2021 Recent Examples on the Web: Verb However, those fleet operators could decide to forego the use of their vehicles and to use them, instead, to heat and cool their homes. Ken Silverstein, Forbes, 2 Jan. 2022 Wrap in a clean kitchen towel and set aside to cool completely, about 15 to 20 minutes. Joanne Kempinger Demski, Milwaukee Journal Sentinel, 29 Dec. 2021 Heat pumps use the refrigeration cycle to heat and cool your home. David Hodari, WSJ, 14 Dec. 2021 Despite Manabe’s findings, scientists there could not agree whether the Earth was more likely to heat up or cool down. The New Yorker, 10 Dec. 2021 Then strain with a cheesecloth and set aside to cool. Outside Online, 1 Oct. 2021 After more than a generation of filling homes with furniture, Ikea is looking to heat and cool them as well., 18 Aug. 2021 While the onions are cooking, char 1 red bell pepper directly on a gas burner or under the broiler until blackened on all sides, then set aside to cool in a resealable plastic bag. Irina Groushevaia, Bon Appétit, 15 July 2021 Because extreme temperatures can irreversibly damage battery cells, EVs will heat or cool the pack as needed to protect it. Sharon Carty, Car and Driver, 7 July 2021 Recent Examples on the Web: Noun If Omicron continues to move quickly, surging and fading within a few weeks and proving mild for most, his restrained response will look like a cool-headed and wise reaction to fast-moving events. Damon Linker, The Week, 21 Dec. 2021 With any type of exercise, warm-ups and cool-downs are essential. cleveland, 3 Dec. 2021 Take lid off, fluff, then fold in Parmesan and let cool then chill in the fridge for at least 4 to 5 hours. Essence, 1 Sep. 2021 Transfer the pan to a wire rack to cool for 10 minutes., 30 Aug. 2021 Prep and perfect a glowing complexion with Strobe Cream (0.2 ounces) and Prep + Prime Fix+ (0.17 ounces), as well as a full-size Powder Kiss Lipstick in Werk Werk Werk (a cool-toned, medium-dark red; 0.1 ounces) — valued altogether at $35. Sarah Han, Allure, 28 July 2021 Last week’s episode saw Beth confronting her father’s houseguest, Kayce searching for a new home and Lloyd losing his cool. Ben Flanagan |, al, 12 Dec. 2021 Should presidents need to mind their language constantly for fear that losing their cool could cross a line into legal responsibility? Jennifer Peltz, ajc, 3 Dec. 2021 The usual stories are well represented: English and Italian heritage brands, Americana, French cool, the Belgian and Japanese avant-garde. Alexander Freeling, Robb Report, 24 Nov. 2021 Recent Examples on the Web: Adverb These cool-looking people on Myspace were posting about these epic dance parties in L.A. Los Angeles Times, 6 Jan. 2022 Joan Didion, the sharp-eyed and cool-headed journalist, essayist and novelist who chronicled the social upheavals of the 1960s, the cultural landscape of California and the inner struggles of grief, died Thursday at her home in New York. NBC News, 24 Dec. 2021 Let the caramel cool slightly, then taste and season to taste with flaky salt. Jessica Battilana, San Francisco Chronicle, 30 Nov. 2021 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

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

12 Jan 2022

Cite this Entry

“Cool.” Dictionary, Merriam-Webster, Accessed 23 Jan. 2022.

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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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