PhysicalismJaegwon Kim (1996) takes three principles is defining minimal physicalism: 
1) 
Mind body supervenience: physical indiscernability entails psychological indiscernability. 
2) 
Anti-Cartesian principle: There are no purely mental things. 
3) 
Mind-body dependence: What mental properties a thing has depends on its physical properties.

Note: Other philosophers would describe physicalism differently.