noun

1. a raised horizontal surface of wood, stone, or metal; specif.,
   1. a raised stage or flooring beside railroad tracks or the like
   2. a raised flooring or stage for performers, speakers, etc.
2. ☆ a statement of principles and policies, esp. of a political party
3. a shoe with a platform sole: in full platform shoe
4. 1. a type of computer or other electronic hardware device having a standard design for use with a compatible operating system, software, etc.
   2. such an operating system, software, etc. having a standard design for use with compatible programs, applications, etc.

Etymology: Fr plate-forme, lit., flat form: see plate & form

adjective

1. designating a thick sole of cork, leather, etc. for a shoe
2. designating a shoe with such a sole