/ Dictionary / Index P platform car: Meaning and Definition of Find definitions for: plat'form car" Pronunciation: [key] a railroad freight car having no enclosing sides or top; a flatcar. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. platform bed platform frame Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language