/ Dictionary / Index S simple group: Meaning and Definition of Find definitions for: sim'ple group' Pronunciation: [key] — Math. Math. a group that has no normal subgroup except the group itself and the identity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. simple fruit simple harmonic motion 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