/ Dictionary / Index B boastful: Meaning and Definition of Find definitions for: boast•ful Pronunciation: (bōst'ful), [key] — adj. given to or characterized by boasting. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: boastful (Thesaurus) boaster boat Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language