What is "platform car"

Platform \Plat"form`\, n. [Plat, a. + -form: cf. F. plateforme.]

1. A plat; a plan; a sketch; a model; a pattern. Used also figuratively. [Obs.]
   --Bacon.

2. A place laid out after a model. [Obs.]

   lf the platform just reflects the order.
   --Pope.

3. Any flat or horizontal surface; especially, one that is raised above some particular level, as a framework of timber or boards horizontally joined so as to form a roof, or a raised floor, or portion of a floor; a landing; a dais; a stage, for speakers, performers, or workmen; a standing place.

4. A declaration of the principles upon which a person, a sect, or a party proposes to stand; a declared policy or system; as, the Saybrook platform; a political platform. ``The platform of Geneva.''
   --Hooker.

5. (Naut.) A light deck, usually placed in a section of the hold or over the floor of the magazine. See Orlop.

   Platform car, a railway car without permanent raised sides or covering; a f?at.

   Platform scale, a weighing machine, with a flat platform on which objects are weighed.