Merriam-Webster Online Dictionary

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5 entries found for cool.
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Main Entry: 1cool
Pronunciation: 'kül
Function: adjective
Etymology: Middle English col, from Old English cOl; akin to Old High German kuoli cool, Old English ceald cold -- more at COLD
Date: before 12th century
1 : moderately cold : lacking in warmth
2 a : marked by steady dispassionate calmness and self-control <a cool and calculating administrator -- Current Biography> b : lacking ardor or friendliness <a cool impersonal manner> c of jazz : marked by restrained emotion and the frequent use of counterpoint d : free from tensions or violence <meeting with minority groups in an attempt to keep the city cool>
3 -- used as an intensive <a cool million dollars>
4 : marked by deliberate effrontery or lack of due respect or discretion <a cool reply>
5 : facilitating or suggesting relief from heat <a cool dress>
6 a of a color : producing an impression of being cool; specifically : of a hue in the range violet through blue to green b of a musical tone : relatively lacking in timbre or resonance
7 slang a : very good : EXCELLENT; also : ALL RIGHT b : FASHIONABLE, HIP <not happy with the new shoes...because they were not cool -- Celestine Sibley>
- cool·ish /'kü-lish/ adjective
- cool·ly also cooly /'kü(l)-lE/ adverb
- cool·ness /'kül-n&s/ noun
synonyms COOL, COMPOSED, COLLECTED, UNRUFFLED, IMPERTURBABLE, NONCHALANT mean free from agitation or excitement. COOL may imply calmness, deliberateness, or dispassionateness <kept a cool head>. COMPOSED implies freedom from agitation as a result of self-discipline or a sedate disposition <the composed pianist gave a flawless concert>. COLLECTED implies a concentration of mind that eliminates distractions especially in moments of crisis <the nurse stayed calm and collected>. UNRUFFLED suggests apparent serenity and poise in the face of setbacks or in the midst of excitement <harried but unruffled>. IMPERTURBABLE implies coolness or assurance even under severe provocation <the speaker remained imperturbable despite the heckling>. NONCHALANT stresses an easy coolness of manner or casualness that suggests indifference or unconcern <a nonchalant driver>.