1. Adjective
Contrary to, or differing from, some acknowledged standard, as the Bible, the creed of a church, the decree of a council, and the like; not orthodox; heretical; -- said of opinions, doctrines, books, etc., esp. upon theological subjects.
2. Adjective
Holding heterodox opinions, or doctrines not orthodox; heretical; -- said of persons.
3. Noun
An opinion opposed to some accepted standard.
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