American English

Definition of cool adjective from the Oxford Advanced American Dictionary



    (cooler, coolest)
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    fairly cold
  1. 1fairly cold; not hot or warm a cool breeze/drink/climate Cooler weather is forecast for the weekend. Let's sit in the shade and keep cool. Store lemons in a cool dry place. Thesauruscoldcool freezing chilly lukewarm tepidThese words all describe a person or thing that has a low temperature.cold having a temperature that is lower than usual or lower than the human body; (of food or drink) not heated; cooled after being cooked:I'm cold. Turn the heat up. It was bitterly cold outside. a cold wind hot and cold water I often have cold pizza for (often approving) fairly cold, especially in a pleasant way:a long cool drink We found a cool place to sit.freezing extremely cold; having a temperature below 32°F:It's absolutely freezing outside. I'm freezing!chilly (somewhat informal) too cold to be comfortable:Bring a coat. It might get chilly later.lukewarm (often disapproving) slightly warm, sometimes in an unpleasant way:Her coffee was now lukewarm.tepid (often disapproving) slightly warm, sometimes in an unpleasant way:a glass of tepid waterlukewarm or tepid?There is really no difference in meaning or use between these words.Patterns to feel/get cold/cool/chilly cold/cool/freezing/chilly air/weather a cold/cool/freezing/chilly wind cold/cool/freezing/lukewarm/tepid water a cold/cool/lukewarm/tepid shower/bath cold/lukewarm/tepid tea/coffee/food a cold/cool drink It's cold/chilly/freezing outside.
  2. colors
  3. 2making you feel pleasantly cool a room painted in cool greens and blues
  4. approving
  5. 3(informal) used to show that you admire or approve of something or someone because they are fashionable, attractive, and often different You look pretty cool with that new haircut. Dave's a really cool guy. It's a cool movie. Thesaurusgreatcool fantastic fabulous terrific awesomeThese are all informal words that describe someone or something that is very good, pleasant, enjoyable, etc.great (informal) very good; giving a lot of pleasure:We had a great time in (informal) used to show that you admire or approve of something, often because it is fashionable, attractive, or different:I think their new song's really cool.fantastic (informal) extremely good; giving a lot of pleasure:I had a fantastic vacation in Mexico.fabulous (informal) extremely good:Jane's a fabulous cook.(Fabulous is slightly more old-fashioned than the other words in this set.)terrific (informal) extremely good; wonderful:She's doing a terrific job.awesome (informal) very good, impressive, or enjoyable:The show was just awesome.Patterns to have a(n) great/fantastic/fabulous/terrific/awesome time to look/sound great/cool/fantastic/fabulous/terrific/awesome really great/cool/fantastic/fabulous/terrific/awesome absolutely great/fantastic/fabulous/terrific/awesome
  6. 4(informal) people say Cool! or That's cool to show that they approve of something or agree to a suggestion “We're going to the beach this afternoon.” “Cool!” “Can you come at 10:30 tomorrow?” “That's cool.” I was surprised that she got the job, but I'm cool with it (= it's not a problem for me).
  7. calm
  8. 5calm; not excited, angry, or emotional Keep cool! She tried to remain cool, calm and collected (= calm). He has a cool head (= he stays calm in an emergency).
  9. not friendly/enthusiastic
  10. 6not friendly, interested, or enthusiastic She was decidedly cool about the proposal. He has been cool toward me ever since we had that argument. They gave the Ambassador a cool reception. Her voice was cool and dismissive.
  11. confident
  12. 7(informal) calm and confident in a way that lacks respect for other people, but makes people admire you as well as disapprove She just took his keys and walked out with them, cool as you please. He was a cool customer. No one would think to look for him in a city where he'd been arrested for killing a cop.
  13. money
  14. 8[only before noun] (informal) used about a sum of money to emphasize how large it is The car cost a cool thirty thousand. see also coolly, coolness
  15. Idioms
    (as) cool as a cucumber
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    very calm and controlled, especially in a difficult situation
    play it cool (informal)
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    to deal with a situation in a calm way and not show what you are really feeling
See the Oxford Advanced Learner's Dictionary entry: cool