Learn how to say Platonism correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word Platonism:
the philosophy of Plato or his followers. See Plato.
any of various revivals of Platonic doctrines or related ideas, especially Neoplatonism and Cambridge Platonism (a 17th-century attempt to reconcile Christianity with humanism and science).
the theory that numbers or other abstract objects are objective, timeless entities, independent of the physical world and of the symbols used to represent them.