/ Dictionary / Index P post horse: Meaning and Definition of Find definitions for: post' horse" Pronunciation: [key] a horse kept, as at a station on a post road, for the use of persons riding post or for hire by travelers. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. post horn post house Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language