\ 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

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. See More
Recent Examples on the Web: Adjective The sound of the truck rumbling down your street is another sure sign that a cool and creamy treat is in your future. Jessie Sheehan, Washington Post, 15 June 2022 The Fed lifts rates to curb borrowing, cool off an overheated economy and fend off inflation spikes. Paul Davidson, USA TODAY, 15 June 2022 The following morning, sunny but unusually cool and breezy for mid-August even in Moscow, Red Square was bustling. Gene Myers, Detroit Free Press, 14 June 2022 Meanwhile, Jay-Z looked cool and casual in a matching all-black fit consisting of a black T-shirt, black joggers, and white sneakers. Chelsey Sanchez, Harper's BAZAAR, 14 June 2022 Read on for our 11 best picks, and get ready for a cool—and active—summer! Kathleen Willcox, Popular Mechanics, 13 June 2022 Beau looks a little like Emily, with his deep black hair and armor of icy cool; Dawn’s best friend, Steph, also a lesbian Leo and a party girl, forgives her infractions over and over again. Los Angeles Times, 10 June 2022 To be a part of that culture is a pretty, pretty cool thing. Tyler Coates, The Hollywood Reporter, 10 June 2022 So for these girls who are just on the cusp of becoming teenagers and then adults, to see where your life ends up is a really cool thing. Christian Holub,, 9 June 2022 Recent Examples on the Web: Verb So instead of cutting rates to encourage growth, the Fed is now trying to reverse course and cool the economy. Hamza Shaban, Anchorage Daily News, 16 June 2022 The Fed rate increases are intended to cool the economy and slow the runaway growth in prices. Julia Carpenter, WSJ, 15 June 2022 The Federal Reserve has been raising interest rates to cool the economy and contain price hikes, which rose by 8.6% over the past year. Mike Rogoway | The Oregonian/oregonlive, oregonlive, 15 June 2022 The quick pace of inflation increases the odds that the Fed, which is already trying to cool the economy by raising borrowing costs, will have to move more aggressively and inflict some pain to temper consumer and business demand. New York Times, 10 June 2022 In an attempt at taming rising prices without triggering an economic downturn, the Federal Reserve has been working fastidiously to cool the economy, most notably by raising interest rates. Brigid Kennedy, The Week, 10 June 2022 So higher rates can help cool off an overheating economy. CBS News, 9 June 2022 Job gains maintained their impressive run in May, even as government policymakers took steps to cool the economy and ease inflation. Talmon Joseph Smith,, 3 June 2022 Now that the central bank is pumping the brakes in an effort to cool off the economy, businesses won’t find it as easy to borrow money and fuel ongoing growth. Christopher Hurn, Forbes, 1 June 2022 Recent Examples on the Web: Noun But using walkie-talkies is retro-cool and something your father will surely appreciate. Scott Kramer, Forbes, 1 June 2022 Kevin Hart is giving props to his fellow comedian Dave Chappelle for keeping his cool after being attacked onstage. Jen Juneau,, 6 May 2022 Thomas portrays a man with clear morals and solid trust in the legal system but also one who can lose his cool, his rigid sense of justice, and even control of his tongue. Zachary Lewis, cleveland, 28 Apr. 2022 In the open letter, signed by academy president David Rubin and CEO Dawn Hudson, the organization thanked Rock for keeping his cool immediately after he was slapped. NBC News, 8 Apr. 2022 Yes, even celebrities lose their cool in the presence of other celebrities. Charles Trepany, USA TODAY, 28 Mar. 2022 Ingles can’t lose his cool to that extent in a situation where the Jazz need to rely on him. Andy Larsen, The Salt Lake Tribune, 12 Jan. 2022 Whether or not the changing hiring and retention practices of tech companies this year mean that the wider job market is poised for a cool-off is unclear. Tristan Bove, Fortune, 9 May 2022 What it's made of: A cool-to-the-touch cover encases the mattress and features handles on the side and a non-skid bottom. Grace Wu, Good Housekeeping, 20 May 2022 Recent Examples on the Web: Adverb Or the cool-looking and fashionable trenchcoats and newsboy caps that the Peaky Blinders wear. Andy Meek, BGR, 11 June 2022 When warm weather rolls around, staying cool not only outdoors but also indoors can be a challenge. Theresa Holland,, 16 May 2022 Hyundai has revealed a camper version of the cool-looking Staria van. Joey Capparella, Car and Driver, 19 Apr. 2022 For my medium skin with gold undertones, my favorite Dew Blush shade is Chilly (a cool-toned mauve). Shanna Shipin, Glamour, 14 Apr. 2022 Note again that cool-looking helicopter cutout on the pedal arms. Lee Hutchinson, Ars Technica, 14 Apr. 2022 But later occupants might not realize the necessity of using cool-running bulbs. Washington Post, 28 Feb. 2022 Then in 2010, Andre Balazs—the other hotelier synonymous with the ability to concoct cool—poached Bowd to become chief operating officer at his Andre Balazs Properties, including Chiltern Firehouse and the Chateau Marmont. Fortune, 5 Mar. 2022 And the factors used to adjust industrial production anticipate a cooling in manufacturing activity, but manufacturing didn’t cool much at all. Justin Lahart, WSJ, 16 Dec. 2021 See More

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.

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

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cook wrasse



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Statistics for cool

Last Updated

17 Jun 2022

Cite this Entry

“Cool.” Dictionary, Merriam-Webster, Accessed 24 Jun. 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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