noun. 1. the principle which posits that reality contains matter and that mind is thus, reducible to matter. 2. the positions that all purposeful propositions can be stated in operational definitions and in the language of the physical sciences.
noun. 1. the principle which posits that reality contains matter and that mind is thus, reducible to matter. 2. the positions that all purposeful propositions can be stated in operational definitions and in the language of the physical sciences.