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4 days ago · cool, composed, collected, unruffled, imperturbable, nonchalant mean free from agitation or excitement. cool may imply calmness, deliberateness, or dispassionateness.

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The comprehensive definition of cool. Includes pronunciation, synonyms, etymology, and usage examples to help you master this word.

Cool can similarly be used to describe composure and an absence of excitement or agitation in a person, especially in times of stress (as expressed in the idiom keep one's cool).

COOL definition: moderately cold; neither warm nor cold. See examples of cool used in a sentence.

cool adjective (CALM) C1 calm and not worried or frightened; not influenced by strong feeling of any kind: