rel·a·tiv·ism (rěl'ə-tĭ-vĭz'əm) n.
Philosophy A 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.
The doctrine that no ideas or beliefs are universally true but that all are, instead, “relative” — that is, their validity depends on the circumstances in which they are applied.