/ Dictionary / Index S single-hearted: Meaning and Definition of Find definitions for: sin•gle-heart•ed Pronunciation: (sing'gul-här'tid), [key] — adj. sincere and undivided in feeling or spirit; dedicated; not reflecting mixed emotions: He was single-hearted in his patriotism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. single-handedly singlehood Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language