1

cool

play
adjective \ ˈkül \

Definition of cool

1 :moderately cold :lacking in warmth
  • The plant grows best in cool climates.
2 a :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 1counterpoint)
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
6 a 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 2a)
7 slang
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

coolish

play \ˈkü-lish\ adjective

coolly

or less commonly cooly play \ˈkü(l)-lē\ adverb

coolness

play \ˈkül-nəs\ noun

Examples of cool in a Sentence

  1. The weather is cool today.

  2. The surface is cool to the touch.

  3. The plant grows best in cool climates.

  4. I'm feeling a little cool.

  5. We changed into some cooler clothes.

  6. She remained calm, cool, and collected.

Origin and Etymology of cool

Middle English col, from Old English cōl; akin to Old High German kuoli cool, Old English ceald cold — more at cold

Synonym Discussion of 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

2

cool

verb

Definition of cool

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.
2 a :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 it
  • Newsweek
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

Examples of cool in a Sentence

  1. The fan cools the engine.

  2. the cooling effect of the breeze

  3. Allow the cake to cool before slicing.

  4. the cooling of the ocean waters

  5. I took a break from the discussion to allow my anger to cool.

  6. His interest in her has cooled somewhat.

Recent Examples of cool from the Web

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.

Origin and Etymology of cool

see 1cool

cool Synonyms


3

cool

noun

Definition of cool

1 :a cool time, place, or situation
  • the cool of the evening
2 a :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

Examples of cool in a Sentence

  1. the judge's customary cool stood him in good stead during the sensational trial

  2. I envy you your cool.

Origin and Etymology of cool

see 1cool


4

cool

adverb

Definition of cool

:in a casual and nonchalant manner
  • play it cool

Examples of cool in a Sentence

  1. Here comes Mom. Act cool and she won't suspect a thing.

Recent Examples of cool from the Web

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.

Origin and Etymology of cool

see 1cool


COOL Defined for English Language Learners

cool

play
adjective

Definition of cool for English Language Learners

  • : 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

Definition of cool for English Language Learners

  • : 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

Definition of cool for English Language Learners

  • : in a calm manner : in a way that does not seem unusual or excited


COOL Defined for Kids

1

cool

play
adjective \ ˈkül \

Definition of cool for Students

cooler; coolest
1 :somewhat cold :not warm
  • a cool day
  • a cool room
2 :not letting or keeping in heat
  • cool clothes
3 :3calm 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

coolly

adverb

coolness

noun

2

cool

verb

Definition of cool for Students

cooled; cooling
:to make or become less warm

3

cool

noun

Definition of cool for Students

1 :a time or place that is not warm
  • the cool of the evening
2 :a calm state of mind
  • Keep your cool.

Law Dictionary

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.


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