At the heart of Plato's philosophy is the concept of Ideas, or Ideals, or Forms.
It is supposed that for every object there exists an ideal form of that object which is that object in perfect form.
In modern language, these would be referred to as mathematical abstractions.
Platonic realism is the idea that these abstractions actually exist in some place outside of space and time.
Source of Name
This entry was named for Plato.