01 n. Soundness of faith; a belief in the doctrines taught in the Scriptures, or in some established standard of faith; -- opposed to heterodoxy …
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1.
Soundness of faith; a belief in the doctrines taught in the Scriptures, or in some established standard of faith; -- opposed to heterodoxy or to heresy.“Basil himself bears full and clear testimony to Gregory's orthodoxy.” — Waterland.
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2.
Consonance to genuine Scriptural doctrines; -- said of moral doctrines and beliefs; as, the orthodoxy of a creed.
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3.
By extension, said of any generally accepted doctrine or belief; the orthodox practice or belief.