Cool definition: moderately cold; neither warm nor cold.. See examples of COOL used in a sentence. The official lyric video for Dua Lipa - CoolTaken from her second studio album 'Future Nostalgia' released in 2020, which featured the hit singles 'Don't Sta... Learn the meaning, synonyms, and idioms of the word cool in English. Find out how cool can express temperature, emotion, style, or slang in different contexts and languages. Adjective: cool (cooler,coolest) kool Neither warm nor very cold; giving relief from heat " cool summer dresses "; " cool drinks "; "a cool breeze "; "a cool autumn day "; "a cool room " [informal] Fashionable and attractive at the time; often skilled or socially adept "Mary's dress is really cool "; " it's not cool to arrive at a party too early "; " he's a cool dude "; "that's cool " Marked by calm self-control (especially in trying circumstances); unemotional " play it cool "; " keep cool ...
