orthodoxy

Short definition from Wiktionary

Noun

1. 1
   Correctness of doctrine and belief in regard to any doctrinal (i.e. philosophical or theological) system.
2. 2
   Conformity to established and accepted beliefs (usually of religions).

Proper noun

1. 1
   The Eastern Orthodox Church.
2. 2
   The aggregate of the definitive elements of the Eastern Orthodox Church, such as its faith, worship, theology, and traditions.
3. 3
   The beliefs and practices of Orthodox Judaism.