\begin{definition}[Definition:Platonic Realism]
At the heart of {{AuthorRef|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.
In particular, {{AuthorRef|Plato}} recognised the concept of infinity as a realisable concept.
\end{definition}