Meaning

noun a raised horizontal surface

noun a document stating the aims and principles of a political party

noun the combination of a particular computer and a particular operating system

originFrom Middle French plateforme (“a flat form”), from plate (“flat”) (from Old French plat, from Ancient Greek πλατύς (platús, “flat”)) + forme (“form”) (from Latin fōrma (“shape; figure; form”)); compare flatscape.

Etymology from Wiktionary, CC BY-SA 3.0