/ Dictionary / Index P post house: Meaning and Definition of Find definitions for: post' house" Pronunciation: [key] a house or inn keeping post horses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: posthouse (Thesaurus) post horse posthumous 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