orthodox

adj

1. Conforming to the accepted, established, or traditional doctrines of a given faith, religion, or ideology.

   “Five important modifications were made by the Pietists to the orthodox doctrine of justification, each corresponding to a distinctive aspect of the movement's agenda.”

   “‘These speakers are academics who have specialised in Islamic sciences and are well respected in scholarly circles. It is grossly unjust to suggest that they belong to some fringe ideology rather than orthodox Islam.’”

2. Adhering to whatever is customary, traditional, or generally accepted.

   “She tattled on: first to one, then to the other—then to all, till she had tattled herself out of breath;—and then the orthodox half hour had expired, and the bell was rung, and the carriage ordered, and Mrs. Hare rose to depart.”

   “Not only the quack cures of the past but also many forms of treatment given with the best will and intentions in the world by the best and most orthodox doctors of the time seem strange to us today.”

3. Of the eastern churches, Eastern Orthodox.
4. Of a branch of Judaism.
5. Of pollen, seed, or spores: viable for a long time; viable when dried to low moisture content.
6. Of or pertaining to the Orthodox Churches collectively.
7. (broadly)Of or pertaining to a particular Orthodox Church, usually the Eastern Orthodox Church, sometimes the Oriental Orthodox Church or the Church of the East.
8. (Judaism)Of or pertaining to Orthodox Judaism.
9. (Quakerism)Of or pertaining to the Orthodox Quakers, a group of Quakers (subdivided into the Wilburite, Gurneyite and Beaconite branches) who split with the Hicksite Quakers due to favoring adopting mainstream Protestant orthodoxy.

   “[...which] Doherty hypothesized as the controlling variable for predicting who would become Orthodox or who would be Hicksite.”

noun

1. (uncommon)An Orthodox Christian.

   “The Greek Orthodox population of the 62 bishoprics in 1886 numbered 65,549,096. to which the Orthodoxes of the army and navy must be added.”

   “1984, David Gillard (ed.), British documents on foreign affairs: Reports and papers from the Foreign Office confidential print, Part I: From the mid-nineteenth century to the First World War, Series B: The Near and Middle East, 1856-1914, page 31. The Greek Catholic priesthood, who proselytize among the Orthodoxes, are specially favoured, and donations are given for Masses in the churches of the Capuchin and the Franciscan Friars.”

2. (rare)An Orthodox Jew.