cool

When the weather is cool, it's not quite cold but not warm either. When people are cool, they're mellow and in control.

Cool has many meanings. When the weather goes from 70 degrees to 50, it cooled off. A winning pool player who starts losing also cools off. Drinking lemonade on a hot day is yet another way to cool off. When you lose your temper, you lose your cool. Hot cookies should cool before you eat them. Something fashionable is cool, but if you're cool to an idea, you're not so sure about it. Any situation that becomes less intense has cooled.

Definitions of cool
  1. adjective
    neither warm nor very cold; giving relief from heat
    “a cool autumn day”
    “a cool room”
    cool summer dresses”
    cool drinks”
    “a cool breeze”
    Synonyms:
    cold
    having a low or inadequate temperature or feeling a sensation of coldness or having been made cold by e.g. ice or refrigeration
    air-conditioned
    cooled by air conditioning
    air-cooled
    cooled by a flow of air
    caller
    providing coolness
    precooled
    cooled in advance
    water-cooled
    kept cool or designed to be kept cool by means of water especially circulating water
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    Antonyms:
    warm
    having or producing a comfortable and agreeable degree of heat or imparting or maintaining heat
    hot
    used of physical heat; having a high or higher than desirable temperature or giving off heat or feeling or causing a sensation of heat or burning
    lukewarm, tepid
    moderately warm
    warmed
    having been warmed up
    warming
    imparting heat
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  2. adjective
    (color) inducing the impression of coolness; used especially of greens and blues and violets
    cool greens and blues and violets”
    Synonyms:
    cold
    (color) giving no sensation of warmth
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    Antonyms:
    warm
    (color) inducing the impression of warmth; used especially of reds and oranges and yellows
    hot
    (color) bold and intense
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  3. noun
    the quality of being at a refreshingly low temperature
    “the cool of early morning”
  4. verb
    make cool or cooler
    synonyms: chill, cool down
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    Antonyms:
    heat, heat up
    make hot or hotter
    types:
    quench
    cool (hot metal) by plunging into cold water or other liquid
    ice
    put ice on or put on ice
    refrigerate
    cool or chill in or as if in a refrigerator
    type of:
    alter, change, modify
    cause to change; make different; cause a transformation
  5. verb
    loose heat
    “The air cooled considerably after the thunderstorm”
    synonyms: chill, cool down
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    Antonyms:
    heat, heat up, hot up
    gain heat or get hot
    type of:
    change state, turn
    undergo a transformation or a change of position or action
  6. verb
    lose intensity
    “His enthusiasm cooled considerably”
    synonyms: cool down, cool off
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    type of:
    change
    undergo a change; become different in essence; losing one's or its original nature
  7. adjective
    marked by calm self-control (especially in trying circumstances); unemotional
    “play it cool
    “keep cool
    synonyms: coolheaded, nerveless
    composed
    serenely self-possessed and free from agitation especially in times of stress
  8. adjective
    fashionable and attractive at the time; often skilled or socially adept
    “he's a cool dude”
    “that's cool
    “Mary's dress is really cool
    “it's not cool to arrive at a party too early”
    Synonyms:
    fashionable, stylish
    being or in accordance with current social fashions
  9. noun
    great coolness and composure under strain
    “keep your cool
    synonyms: aplomb, assuredness, poise, sang-froid
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    type of:
    calm, calmness, composure, equanimity
    steadiness of mind under stress
  10. adjective
    psychologically cool and unenthusiastic; unfriendly or unresponsive or showing dislike
    “relations were cool and polite”
    “a cool reception”
    cool to the idea of higher taxes”
    Synonyms:
    unagitated
    not agitated or disturbed emotionally
    unemotional
    unsusceptible to or destitute of or showing no emotion
    unfriendly
    not disposed to friendship or friendliness
    cold
    extended meanings; especially of psychological coldness; without human warmth or emotion
    unresponsive
    aloof or indifferent
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    Antonyms:
    warm
    psychologically warm; friendly and responsive
    emotional
    of more than usual emotion
    friendly
    characteristic of or befitting a friend
    cordial
    politely warm and friendly
    hearty
    showing warm and heartfelt friendliness
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  11. adjective
    (used of a number or sum) without exaggeration or qualification
    “a cool million bucks”
    Synonyms:
    unqualified
    not limited or restricted
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