cool

adjective
\ 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 (see counterpoint entry 1)
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

cool

verb
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

cool

noun

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

cool

adverb

Definition of cool (Entry 4 of 4)

: in a casual and nonchalant manner play it cool

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Other Words from cool

Adjective

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

Adjective

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: Verb

Hamels tossed eight sparkling innings, Willson Contreras homered twice and the Chicago Cubs cooled off the short-handed Los Angeles Angels with a 5-1 victory Friday. Jay Cohen, The Seattle Times, "Hamels helps Cubs beat Trout-less Angels 5-1," 12 Apr. 2019 Keep your home at the perfect temperature for the whole family with these innovative heating and cooling solutions. The Good Housekeeping Institute, Good Housekeeping, "GH Seal Spotlight: York Affinity YXV Air Conditioner and YZV Heat Pump," 5 Apr. 2019 Note: Total time does not include cooling or decorating. Woman's Day Kitchen, Woman's Day, "Egg Puzzle Cookies," 7 Mar. 2019 When a material is cooled enough to form solids, its molecules get bonded in tight arrays. Brian Resnick, Vox, "The surprising science of why ice is so slippery," 31 Jan. 2019 There are, however, ways that warming could also increase emissions: the balance of energy demand for heating and cooling buildings, for example, or the lower efficiency of electrical transmission lines at higher temperatures. Scott K. Johnson, Ars Technica, "The economic impacts of climate change could limit climate change," 19 Dec. 2018 The Skokie Park District sponsored a separate fireworks show at Niles West High School in the evening when the weather had cooled down a bit. Pioneer Press, chicagotribune.com, "Niles 4th of July parade featured marching bands, bevvy of patriotic revelry," 9 July 2018 Tensions have cooled between India and Pakistan since February, when Pakistani jihadists bombed an Indian paramilitary convoy in Kashmir and killed at least 40 Indian soldiers. The Editorial Board, WSJ, "China Shields a Jihadist," 15 Mar. 2019 Cool on pan for 5 minutes, then remove to a wire rack to cool completely. Beth Lipton, Country Living, "Bunny Sugar Cookies," 8 Mar. 2019

Recent Examples on the Web: Noun

Benson opted for the classic cool of camel cashmere and a floor-grazing overcoat. Janelle Okwodu, Vogue, "How Cara Delevingne and Ashley Benson Dress for Date Night at the Moulin Rouge," 10 Apr. 2019 Inside the notebook, however, is Acer’s 4th Gen AeroBlade cooling system, which features metal fans that increase airflow by 45 percent, as well as Coolboost technology that keeps the notebook cool during extended gaming sessions. Mark Hachman, PCWorld, "Acer's swivel-display Predator Triton 900 will include Nvidia's mobile RTX graphics," 6 Jan. 2019 Like, cooler than the other side of the pillow cool at all times. Danielle Tullo, House Beautiful, "These Sheets Made Me, The World's Hottest Sleeper, Not Sweat," 20 Nov. 2018 The end result in this region is that air masses are pulled together and upwards a little more strongly, bringing in more moisture that condenses into rain clouds as the rising air cools. Scott K. Johnson, Ars Technica, "Carpeting Sahara with wind and solar farms could make it rain," 8 Sep. 2018 Using the pulse button helps keep the processor cool and the resulting pesto textured. Aleksandra Crapanzano, WSJ, "6 Fresh Takes on Pesto," 3 Aug. 2018 Farmiga, a formidable actress, spins her wheels as the neurotic and harried Laura and contrasts sharply with the easy cool of Plummer as Jack. Katie Walsh, Detroit Free Press, "Review: Road movie ‘Boundaries’ travels well-worn path," 6 July 2018 As the digital money frenzy of the past few years cools, the crypto coin graveyard is filling up. Fortune, "Crypto Coin Graveyard Fills Up Fast as ICOs Meet Their Demise," 28 June 2018 In the cool of the evening, the older folks visit at the picnic tables beside the stream. John Maccormack, San Antonio Express-News, "Rash of earthquakes prompts fear of oil boom in Balmorhea," 15 June 2018

Recent Examples on the Web: Adverb

Place the pot over a large bowl filled with ice water and let cool, stirring occasionally, until chilled, 20 to 30 minutes. Kate Merker And Taylor Murray, Country Living, "Gingerbread Eggnog," 11 Dec. 2018 Let cool slightly to thicken, then transfer to a resealable bag and cut off one corner to make a small hole. Woman's Day Kitchen, Woman's Day, "Eggnog Mousse Snowmen," 29 Nov. 2018 Let cool slightly before serving, or cool completely before storing. Charlotte Druckman, sacbee, "In a churn of events, salted butter is back | The Sacramento Bee," 8 May 2018 Let cool a few minutes, then take egg cups out of muffin pan to cool on a rack. Anna Thomas Bates, Milwaukee Journal Sentinel, "Egg cups make an easy grab-and-go lunch," 21 Feb. 2018 Drain well and let cool before peeling and cutting the eggs in half lengthwise, reserving the yolks. Alysha Witwicki, Milwaukee Journal Sentinel, "What to bring? These side dishes are always welcome at a summer picnic," 29 June 2018 Transfer to a wire rack and let cool before slicing. Steven Satterfield, Country Living, "Buttermilk Cornbread," 1 Feb. 2011 Let cool slightly, then transfer oil and spice mixture to a bowl. Jonah Miller, WSJ, "Throw a Summer Party the Effortless Spanish Way," 6 July 2018 Let cool completely, cover with plastic or store airtight, and store at room temperature. Claire Saffitz, Bon Appetit, "The 10 Baking Questions People Ask Me Literally All the Time, Answered," 21 May 2018

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

Adjective

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

Verb

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

Noun

15th century, in the meaning defined at sense 1

Adverb

1968, in the meaning defined above

History and Etymology for cool

Adjective

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

Verb

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)

Noun

Middle English cole, derivative of col cool entry 1

Adverb

derivative of cool entry 1

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Learn More about cool

Dictionary Entries near cool

cook up

cookware

cook wrasse

cool

coolabah

coolamon

coolant

Statistics for cool

Look-up Popularity

Time Traveler for cool

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

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More Definitions for cool

cool

adjective

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

cool

verb

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

cool

adverb

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

cool

adjective
\ 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

cool

verb
cooled; cooling

Kids Definition of cool (Entry 2 of 3)

: to make or become less warm

cool

noun

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

Rhyming Dictionary: Words that rhyme with cool

Thesaurus: All synonyms and antonyms for cool

Spanish Central: Translation of cool

Nglish: Translation of cool for Spanish Speakers

Britannica English: Translation of cool for Arabic Speakers

Comments on cool

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