Pronunciation: (her'u-sē),[key] —n., —pl.-sies. 1. opinion or doctrine at variance with the orthodox or accepted doctrine, esp. of a church or religious system.
2. the maintaining of such an opinion or doctrine.
3. Rom. Cath. Ch.the willful and persistent rejection of any article of faith by a baptized member of the church.
4. any belief or theory that is strongly at variance with established beliefs, customs, etc.