Definition: "Anabaptism" refers to the religious movement in early Christianity during the reign of Emperor Constantine. It arose as a counter-reformation movement aimed at rejecting the Christian faith, focusing on spiritual practices (such as asceticism) and rejection of worldly power and social norms. This term is often associated with the rise of the Anabaptists, who opposed the traditional church leadership in favor of their own independent sect. The word "Anabaptist" is now used to describe anyone who rejects modern forms of authority or tradition in religious pursuits.