Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “cool”

See all translations

cool

adjective

cool adjective (COLD)

   /kul/ [-er/-est only] slightly cold; of a low temperature: a cool evening/breeze Cereals should be stored in a cool, dry place.

cool adjective (UNFRIENDLY)

   /kul/ [-er/-est only] unfriendly or not showing affection or interest in something or someone: "Well, that’s just too bad," Bill replied in a cool tone.

cool adjective (CALM)

   /kul/ [-er/-est only] calm and not anxious or frightened: What’s needed now is calm, cool thinking. He made a cool assessment of the situation.

cool adjective (GOOD)

   /kul/ [-er/-est only] infml excellent; very good: It’s way cool to see you again!    /kul/ [-er/-est only] infml Cool is also used to show agreement with or acceptance of what someone says: "He wants to come with us." "Cool."

cool adjective (COLORS)

art /kul/ (of colors) not very bright or dark, and esp. containing green, blue, or gray
Idioms

cool

noun [U]  /kul/ us  

cool noun [U] (CALM)

infml the ability to stay calm and not get upset or angry: He’s gone swimming with sharks without losing his cool.

cool

verb [I/T]  /kul/ us  

cool verb [I/T] (COLD)

to lose heat or cause someone or something to lose heat: [I] Remove the pie from the oven and let it cool for 30 minutes. [I/T] He jumped into the pool to cool (himself) off.

cool verb [I/T] (CALM)

to (cause to) become calm or weaker in feeling: [I] We need to allow time for tempers to cool. [T] I wish Casey would cool his enthusiasm for video games.
(Definition of cool from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of cool?
Add Cambridge dictionaries to your browser to your website

Definitions of “cool” in other dictionaries

Word of the Day

lamb

a young sheep, or the flesh of a young sheep eaten as meat

Word of the Day

The way we move (Verbs for walking and running)

by Kate Woodford,
March 25, 2015
​​​ This week we’re looking at interesting ways to describe the way that people move. Most of the verbs that we’ll be considering describe how fast or slow people move. Others describe the attitude or state of mind of the person walking or running. Some describe both. Starting with verbs for walking slowly,

Read More 

crossfit noun

March 23, 2015
high-intensity strength training Two women in strappy dresses discussed how much weight they could snatch

Read More