coolly /ˈkuːl.li/adverb 3adjective 1forms 2 adverb3 •At a moderately low temperature.The wind blew coolly. •In a cool, unpanicked or collected manner.Well, she looks at you so coolly / And her eyes shine like the moon in the sea — 1976 •With calm impudence.They walked in, not even wearing masks, and coolly robbed the bank of twelve thousand pounds. adjective1 •(no longer used) Coolish; somewhat cool in temperature.Keeping my sheep amongst the coolly shade of the green alders. — 1595 formsmore coolly · most coolly