the GNU version of the Collaborative International Dictionary of English
n. An opinion or doctrine, or a system of doctrines, contrary to some established standard of faith, as the Scriptures, the creed or standards of a church, etc.; heresy.
The Century Dictionary and Cyclopedia
n. The quality or state of being heterodox: as, the heterodoxy of a doctrine, book, or person.
n. A heterodox belief or doctrine; a departure from an established standard or principle; a heresy.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the quality of being unorthodox
n. any opinions or doctrines at variance with the official or orthodox position
Word Usage
"I'll be using the word heterodoxy in future, even though I don't know what it means."