/ Dictionary / Index B baneful: Meaning and Definition of Find definitions for: bane•ful Pronunciation: (bān'ful), [key] — adj. destructive; pernicious: a baneful superstition. deadly; poisonous: baneful herbs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: baneful (Thesaurus) baneberry Banerjea 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