Breadcrumb Home > Dictionary > Index P pony truss: Meaning and Definition of Find definitions for: po'ny truss" Pronunciation: [key] a through bridge truss having its deck between the top and bottom chords and having no top lateral bracing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ponytail Ponzi ✖ Related Content Daily Word Quiz: rocrustean Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language