/ Dictionary / Index W wasteful: Meaning and Definition of Find definitions for: waste•ful Pronunciation: (wāst'ful), [key] — adj. given to or characterized by useless consumption or expenditure: wasteful methods; a wasteful way of life. grossly extravagant; prodigal: a wasteful party. devastating or destructive: wasteful war. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: wasteful (Thesaurus) wasted waste gate Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language