/ Dictionary / Index S stock horse: Meaning and Definition of Find definitions for: stock' horse" Pronunciation: [key] — Western U.S. Western U.S. a horse or pony used in herding cattle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. stockhorn stockinette Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language