Noun

1. The theory, especially in ethics or aesthetics, that conceptions of truth and moral values are not absolute but are relative to the persons or groups holding them.
2. A specific such theory, advocated by a particular philosopher or school of thought.
   • 2008, Paul Boghossian, “Replies to Wright, MacFarlane and Sosa,” Philosophical Studies, vol. 141, no. 3, p. 413: 

     Following Gilbert Harman’s lead, my own formulation of relativism about the normative domain was based on the classic examples of thoroughgoing relativisms drawn from physics.