Indifferentism \In*dif"fer*ent*ism\, n. [Cf. F. indiff['e]rentisme.] 1. State of indifference; lack of interest or earnestness; especially, a systematic apathy regarding what is true or false in religion or philosophy; agnosticism.
The indifferentism which equalizes all religions and gives equal rights to truth and error. --Cardinal Manning.
2. (Metaph.) Same as {Identism}.
3. (R. C. Ch.) A heresy consisting in an unconcern for any particular creed, provided the morals be right and good. --Gregory XVI.