Definition of: Socinian

(sō·sin′·ē·ən) adjective
Pertaining to either or both of the Italian theologians named Socinus or to their religious teachings, as the denial of the Trinity, of the natural depravity of man, of vicarious atonement, and of the efficacy of sacraments.
—noun A believer in the Socinian theory.
—So·cin′i·an·ism noun