Definition of nonchalant:
effortless, casual, passing, collected, everyday, cursory, cool-headed, untroubled, devil-may-care, possessed, incurious, unimpressible, occasional, even, fooling, insouciant, regardless, unruffled, offhand, free-and-easy, laid-back, chance, easy, light, smooth, unruffled, unexcited, daily, lackadaisical, relaxed, unconcerned, collected.
- indifferent (part of speech: adjective)
- reckless (part of speech: adjective)
unexcitable (part of speech: adjective)
insensitive (part of speech: adjective)
- "The Art of Public Speaking", Dale Carnagey (AKA Dale Carnegie) and J. Berg Esenwein.
And I have marvelled at the nonchalant way in which the fiction writer often rushes into the writing of a play, when a painter would never think of trying to " sculpt" until he had learned at least some of the very different processes employed in the strange art- form of sculpture.- "Writing for Vaudeville", Brett Page.
There were only two who held their ground, Brackenbury and an old red- nosed cavalry Major; but these two preserved a nonchalant demeanour, and, beyond a look of intelligence which they rapidly exchanged, appeared entirely foreign to the discussion that had just been terminated.- "New-Arabian-Nights", Stevenson, Robert Louis.