Etymology: Middle French plate-forme diagram, map, literally, flat form
Date: 1535
1:plan, design 2: a declaration of the principles on which a group of persons stands; especially: a declaration of principles and policies adopted by a political party or a candidate 3 a (1): a usually raised horizontal flat surface; especially: a raised flooring (2): a device or structure incorporating or providing a platform; especially: such a structure on legs used for offshore drilling (as for oil) b: a place or opportunity for public discussion 4 a: a usually thick layer (as of cork) between the inner sole and outer sole of a shoe b: a shoe having such a sole 5 a: a vehicle (as a satellite or aircraft) used for a particular purpose or to carry a usually specified kind of equipment b:operating system; also: the computer architecture and equipment using a particular operating system