\In*dif"fer*ent*ism\, n. [Cf. F.
indiff['e]rentisme.]
1. State of indifference; want 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.