Definition of it deals:
(adj) :
Optimal; being the best possibility.
(adj) :
Perfect, flawless, having no defects.
(n) :
A perfect standard of beauty, intellect etc., or a standard of excellence to aim at.
(adj) :
Pertaining to ideas, or to a given idea.
(adj) :
Existing only in the mind; conceptual, imaginary.
(adj) :
Teaching or relating to the doctrine of idealism.