/ Dictionary / Index I insouciance: Meaning and Definition of Find definitions for: in•sou•ci•ance Pronunciation: (in-s'sē-uns Fr. an-s-syäns'), [key] — n. the quality of being insouciant; lack of care or concern; indifference. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: insouciance (Thesaurus) insomuch insouciant Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language