1. State of indifference; lack of interest or earnestness; especially, a systematic apathy regarding what is true or false in religion or philosophy; agnosticism. [ 1913 Webster ]
The indifferentism which equalizes all religions and gives equal rights to truth and error. Cardinal Manning. [ 1913 Webster ]
2. (Metaph.) Same as Identism. [ 1913 Webster ]
3. (R. C. Ch.) A heresy consisting in an unconcern for any particular creed, provided the morals be right and good. Gregory XVI. [ 1913 Webster ]