/ Dictionary / Index S simple-hearted: Meaning and Definition of Find definitions for: sim•ple-heart•ed Pronunciation: (sim'pul-här'tid), [key] — adj. free of deceit; artless; sincere. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. simple harmonic motion simple honors Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language