Platform (theatre) definition

(1) A woman's shoe with a very high thick sole

(2) A raised horizontal surface

"The speaker mounted the platform"

(3) Any military structure or vehicle bearing weapons

(4) The combination of a particular computer and a particular operating system

(5) A document stating the aims and principles of a political party

"Their candidate simply ignored the party platform"

"They won the election even though they offered no positive program"