Plăt’fōrm, n.

n. [Eng. plat, flat, and form; Fr. plate-forme, Sp. plataforma, It. piattaforma.]

1. Something which is of a flat or level surface; as, (a.) A framework of timber or boards horizontally joined, so as to form a roof. (b.) A framework of timber or boards horizontally joined, so as to form a conspicuous or elevated standing-place. (c.) A kind of terrace, or broad, smooth, open walk on the top of a building, as in the oriental houses. Gwilt. (d.) (Mil.) An elevation of earth, or a floor of wood or stone, on which cannons are mounted to fire on an enemy. (e.) The sketch of any thing horizontally delineated; the ichnography. Sandys. (f.) (Naut.) The orlop. See ORLOP.
2. Hence, the position which any body of men avowedly assumes; a declaration of principles to which any body of men declare their adhesion; as the Saybrook platform; the platform of a political party.

Their minds and affections were universally bent even against all the orders and laws wherein the church is founded, conformable to the platform of Geneva. Hooker.