/ Dictionary / Index I insecurity: Meaning and Definition of Find definitions for: in•se•cu•ri•ty Pronunciation: (in"si-kyoor'i-tē), [key] — pl. -ties. lack of confidence or assurance; self-doubt: He is plagued by insecurity. the quality or state of being insecure; instability: the insecurity of her financial position. something insecure: the many insecurities of life. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: insecurity (Thesaurus) insecure inselberg Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language