/ Dictionary / Index N nonchalance: Meaning and Definition of Find definitions for: non•cha•lance Pronunciation: (non"shu-läns', non'shu-läns", -luns), [key] — n. the state or quality of being nonchalant; cool indifference or lack of concern; casualness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nonchalance (Thesaurus) nonce word nonchalant 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