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cool
WIKTIONARY
cool
Adjective
  • Having a slightly low temperature; mildly or pleasantly cold.
  • Allowing or suggesting heat relief.
  • Of a person, not showing emotion, calm and in self-control.
  • Unenthusiastic, lukewarm, skeptical.
  • Calmly audacious.
  • Of a person, knowing what to do and how to behave; considered popular by others. informal
  • In fashion, part of or fitting the in crowd; originally hipster slang. informal
  • Of an action, all right; acceptable; that does not present a problem. informal
  • Of a person, not upset by circumstances that might ordinarily be upsetting. informal
  • Applied facetiously to a sum of money, commonly as if to give emphasis to the largeness of the amount.
Noun
  • A moderate or refreshing state of cold; moderate temperature of the air between hot and cold; coolness.
  • A calm temperament.
Verb
  • To lose heat, to get colder. literally intransitive
  • To make cooler, less warm. transitive
  • To become less intense, e.g. less amicable or passionate. figuratively, intransitive
  • To make less intense, e.g. less amicable or passionate. transitive
COOL
Acronym
  • CLIPS Object-Oriented Language computing