Orthodox in Christianity may refer to:

Eastern Orthodox Church, the Church descended from the Imperial Church of the Byzantine Empire

Orthodox Judaism, a set of strict Judaic traditions characterized by rigid interpretation of Jewish law

Eastern Christianity, referring collectively to the Eastern Christian churches and their religious traditions

Oriental Orthodox Church, the communion of Eastern Christian Churches that recognize only the first three ecumenical councils, and reject the dogmatic definitions of the Council of Chalcedon

The word orthodox, from the Greek ortho ('right', 'correct') and doxa ('thought', 'teaching', 'glorification'), is typically used to refer to the correct worship or the correct theological and doctrinal observance of religion, or other forms of...

Lutheran Orthodoxy

Orthodox stance, in boxing, the designation for the normal stance for a right-handed boxer or Mixed Martial Arts combatant.