/ Dictionary / Index C cart horse: Meaning and Definition of Find definitions for: cart' horse" Pronunciation: [key] a strong horse bred to draw heavy loads; draft horse. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: carthorse (Thesaurus) Carthaginian peace Carthusian Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language