/ Dictionary / Index P packhorse: Meaning and Definition of Find definitions for: pack•horse Pronunciation: (pak'hôrs"), [key] a horse used for carrying goods, freight, supplies, etc. a person who works hard or bears a heavy load of responsibility. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: packhorse (Thesaurus) packframe pack ice Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language