(a) Theology. A person who considers reason to be the ultimate authority in religion; spec. a person who explains supernatural or miraculous events…

Christian Church. Frequently in form New Light. A person holding novel religious doctrines; a revivalist; spec. a member of any of several churches…

= new light, n. 1a.

Theology. One who adopts neologism in theology or religious matters; a rationalist. Now historical.

A person holding or proposing neologian views; a rationalist, a neologist (neologist, n. 2). Now historical.

Theology. Frequently in form Modernist. A person who inclines to, supports, or advocates modernism (see modernism, n. 3).