Of religious belief or a religious principle: orthodox, true; that ought to be accepted or followed.

Right, correct, true; in accordance with what is accepted or authoritatively established as the true… Of, belonging to, or in accordance with the…

Hence, Of or belonging to this Church; of the true apostolic Church, orthodox. Of belief, doctrine, etc.

Of persons: Holding accepted, approved, solid, or well-grounded opinions or views, esp. in regard to religious belief; orthodox.

Of or belonging to all, general, universal; esp. belonging to the universal faith = catholic, adj. 5b 6a, etc.

= orthodox, adj. 1, 2.

Characterized by orthodoxy; orthodox.

Of opinions, doctrines, practices, etc.: conforming with what is accepted or authoritatively established as true; = orthodox, adj. 1.

figurative. Commensurate with the Divine idea or pattern; agreeing with the Word of God (cf. quot. 1680 at asymmetral, adj. 1, and 1683 below)…

figurative (originally and chiefly U.S.). Uncompromising, hard-line (originally esp. in regard to religious observance); = hard-shelled, adj. 2b.

figurative. Originally and chiefly U.S. Strongly or rigorously committed, uncompromising, esp. in one's adherence to religious or political…

spec. Acting in accordance with the rituals and rules of behaviour associated with a particular religion, esp. Judaism.