- of, relating to, or conforming to the approved form of any doctrine, philosophy, ideology, etc.
- of, relating to, or conforming to beliefs, attitudes, or modes of conduct that are generally approved.
- customary or conventional, as a means or method; established.
- sound or correct in opinion or doctrine, especially theological or religious doctrine.
- conforming to the Christian faith as represented in the creeds of the early church.
- (initial capital letter) of, relating to, or designating the Eastern Church, especially the Greek Orthodox Church.
- (initial capital letter) of, relating to, or characteristic of Orthodox Jews or Orthodox Judaism.
- conforming with established or accepted standards, as in religion, behaviour, or attitudes
- conforming to the Christian faith as established by the early Church
- of or relating to the Orthodox Church of the East
- (sometimes not capital)
- of or relating to Orthodox Judaism
- (of an individual Jew) strict in the observance of Talmudic law and in personal devotions
adj.mid-15c., of opinions, faith, from Late Latin orthodoxus, from Greek orthodoxos “having the right opinion,” from orthos “right, true, straight” (see ortho-) + doxa “opinion, praise,” from dokein “to seem,” from PIE root *dek- “to take, accept” (see decent). As the name of the Eastern Church, first recorded in English 1772; in reference to a branch of Judaism, first recorded 1853.