According to answer.com Magick is " The art that purports to control or forecast natural events ,effects or forces by invoking the supernatural. The practice of using charms,spells,or riutals to attempt to produce supernatural effects or controle events in nature."
I feel this is a good working definiton of the term Magick. In realtions to metaphysics I would say that the term magick would be the verb and Metaphysics would be the noun. Metaphysics is the science that deals with the energy that is used to create magick in ones life.