What is the meaning of cool?

noun

• The quality of being at a refreshingly low temperature.
  • usage: "the cool of early morning"
• Great coolness and composure under strain.
  • usage: "keep your cool"
  • synonyms: aplomb, assuredness, poise, sang-froid

verb

• Make cool or cooler.
  • usage: "Chill the food"
  • synonyms: chill, cool down
• Loose heat.
  • usage: "The air cooled considerably after the thunderstorm"
  • synonyms: chill, cool down
• Lose intensity.
  • usage: "His enthusiasm cooled considerably"
  • synonyms: cool off, cool down

adjective

• Neither warm nor very cold; giving relief from heat.
  • usage: "a cool autumn day"; "a cool room"; "cool summer dresses"; "cool drinks"; "a cool breeze"
• Marked by calm self-control (especially in trying circumstances); unemotional.
  • usage: "play it cool"; "keep cool"; "stayed coolheaded in the crisis"; "the most nerveless winner in the history of the tournament"
  • synonyms: coolheaded, nerveless
• Color) inducing the impression of coolness; used especially of greens and blues and violets. (
  • usage: "cool greens and blues and violets"
• Psychologically cool and unenthusiastic; unfriendly or unresponsive or showing dislike.
  • usage: "relations were cool and polite"; "a cool reception"; "cool to the idea of higher taxes"
• Used of a number or sum. ( without exaggeration or qualification)
  • usage: "a cool million bucks"
• Fashionable and attractive at the time; often skilled or socially adept.
  • usage: "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"