Platonism: A position which holds or resembles Plato’s view that there is an ideal noumenal realm of pure, self-subsistent, eternal and perfect Forms independent of material reality which consists of inferior and mutable copies and appearances.

Source: What is Good? What is Bad? The Value of All Values across Time, Place and Theories’ by John McMurtry, Philosophy and World Problems, Volume I-III, UNESCO in partnership with Encyclopedia of Life Support Systems: Oxford, 2004-11.