The Collaborative International Dictionary of English v.0.48:

Nonconforming \Non`con*form"ing\, a.
   Not conforming; declining conformity; especially, not
   conforming to the established church of a country.
   [1913 Webster]

WordNet (r) 3.0 (2006):

nonconforming
    adj 1: not conforming to established customs or doctrines
           especially in religion [syn: nonconforming,
           nonconformist]