/ Dictionary / Index S side horse: Meaning and Definition of Find definitions for: side' horse" Pronunciation: [key] — Gymnastics. Gymnastics. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sidehill sidekick Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language