1. (n.) An opinion held in opposition to the established doctrine\, and tending to promote a division or party, as in politics, literature, philosophy, etc.; -- usually, but not necessarily, said in reproach.

2. (n.) Religious opinion opposed to the authorized doctrinal standards of any particular church, especially when tending to promote schism or separation; lack of orthodox or sound belief; rejection of, or erroneous belief in regard to, some fundamental religious doctrine or truth; heterodoxy.

3. (n.) An offense against Christianity, consisting in a denial of some essential doctrine, which denial is publicly avowed, and obstinately maintained.

Albigensianism Arianism Bohemianism Catharism Ebionitism Erastianism Gnosticism Jovinianism Lollardy Manichaeanism Manichaeism Monophysism Monophysitism Pelagianism Waldensianism Wyclifism aberrancy aberration agnosticism ambiguity ambivalence antinomianism antinomy apostasy asymmetry atheism beatnikism defection defectiveness delusion denial deviancy disbelief discredit disproportion disproportionateness dissent dissidence distortion emanatism equivocality errancy erroneousness error fallaciousness fallacy false doctrine falseness falsity fault faultiness flaw flawedness fringiness hamartia heterodoxy heterogeneity hippiedom hylotheism illusion impiety inability to believe incoherence incommensurability incompatibility incongruity inconsistency inconsonance incredulity infidelity irreconcilability minimifidianism misapplication misbelief misconstruction misdoing misfeasance misinterpretation misjudgment nonbelief nonconformability nonconformism nonconformity nullifidianism originality oxymoron pantheism paradox peccancy perversion rejection revisionism schism self-contradiction sin sinfulness unbelief unbelievingness unconformability unconformity unconventionality unorthodoxy untrueness untruth untruthfulness wrong wrongness