Cool Definition

ko͝ol
cooled, coolest, cooling, cools, cooler
adjective
coolest, cooler
Moderately cold; neither warm nor very cold.
Webster's New World
Tending to reduce discomfort in warm or hot weather.
Cool clothes.
Webster's New World
Not excited; calm; composed.
Cool in an emergency.
Webster's New World
Marked by control of the emotions; restrained.
Cool jazz.
Webster's New World
Showing dislike or indifference; not cordial.
A cool manner.
Webster's New World
adverb
In a cool manner.
Webster's New World
verb
cooled, cooling, cools
To make cool or colder.
Webster's New World
To make less ardent, intense, or zealous.
Problems that soon cooled my enthusiasm for the project.
American Heritage
To become cool or colder.
Webster's New World
To reduce the molecular or kinetic energy of (an object).
American Heritage
To become calmer.
Needed time for tempers to cool.
American Heritage
noun
cools
A cool place, time, thing, part, etc.
The cool of the evening.
Webster's New World
Cool, dispassionate attitude or manner.
Webster's New World
Composure; poise.
American Heritage

A moderate or refreshing state of cold; moderate temperature of the air between hot and cold; coolness.

In the cool of the morning.
Wiktionary
Wiktionary
idiom
cool it
  • To calm down; relax.
  • To stop doing something.
American Heritage
cool (one's) heels
  • To wait or be kept waiting.
American Heritage
cool down
  • to lower the body temperature, pulse, etc. after vigorous exercise
  • to become less heated, passionate, agitated, angry, etc.
Webster's New World
cool it
  • to calm down
Webster's New World
cool off
  • to calm down
  • to lose enthusiasm, interest, etc.
Webster's New World

Other Word Forms of Cool

Adjective

Base Form:
cool
Comparative:
cooler
Superlative:
coolest

Idioms, Phrasal Verbs Related to Cool

Origin of Cool

  • From Middle English colen, from Old English cōlian (“to cool, grow cold, be cold”), from Proto-Germanic *kōlēną (“to become cold”), from Proto-Indo-European *gel- (“to freeze”). Cognate with Dutch koelen (“to cool”), German kühlen (“to cool”), Swedish, häftig (“cool”)kyla (“to cool, refrigerate”). Also partially from Middle English kelen, from Old English cēlan (“to cool, be cold, become cold”), from Proto-Germanic *kōlijaną (“to cool”), altered to resemble the adjective cool. See keel.

    From Wiktionary

  • From Middle English, from Old English cōl (“cool, cold, tranquil, calm”), from Proto-Germanic *kōlaz, *kōlijaz (“cool”), from Proto-Indo-European *gelǝ- (“cold”). Cognate with Dutch koel (“cool”), German kühl (“cool”). Related to cold.

    From Wiktionary

  • Middle English cole from Old English cōl gel- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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