"In philosophy, physicalism is the ontological thesis that \"everything is physical\", that there is \"nothing over and above\" the physical, or that everything supervenes on the physical. Physicalism is a form of ontological monism\u2014a \"one substance\" view of the nature of reality as opposed to a \"two-substance\" (dualism) or \"many-substance\" (pluralism) view. Both the definition of \"physical\" and the meaning of physicalism have been debated.Physicalism is closely related to materialism."@en . .