Illuminati, a class or fraternity of people who affect superior enlightenment, particularly on religious and social matters, tending of late in the one to Deism, and in the other to Republicanism, in France forming a body of materialists, and in Germany a body of idealists; the former to the disparagement of ideas, and the latter to the disparagement of reason, and both hostile to the Church.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Illuminated Doctor * Illumination, The