/ Dictionary / Index N nonchalant: Meaning and Definition of Find definitions for: non•cha•lant Pronunciation: (non"shu-länt', non'shu-länt", -lunt), [key] — adj. coolly unconcerned, indifferent, or unexcited; casual: His nonchalant manner infuriated me. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nonchalant (Thesaurus) nonchalance nonclassical Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language