/ Dictionary / Index S slimnastics: Meaning and Definition of Find definitions for: slim•nas•tics Pronunciation: (slim-nas'tiks), [key] — n. (used with a sing. or pl. v.) exercises to help someone lose or control weight. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. slimmer slimsy Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language