/ Dictionary / Index U ungrateful: Meaning and Definition of Find definitions for: un•grate•ful Pronunciation: (un-grāt'ful), [key] — adj. unappreciative; not displaying gratitude; not giving due return or recompense for benefits conferred: ungrateful heirs. unpleasant; distasteful; repellent: an ungrateful task. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ungrateful (Thesaurus) ungrammatical ungrudging Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language