Definition of "orthodox"

orthodox

/ˈɔːθədɒks/

adjective
comparative more orthodox, superlative most orthodox
1. Conforming to the accepted, established, or traditional doctrines of a given faith, religion, or ideology.
  Quotations
  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.
  2005, Alister E McGrath, Iustitia Dei
  ‘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.’
  2009 December 23, Andrew Brown, The Guardian
2. Adhering to whatever is customary, traditional, or generally accepted.
  Quotations
  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.
  1838, [Edward Bulwer-Lytton], chapter VII, in Alice or The Mysteries […], volume I, London: Saunders and Otley, […], book III, pages 297–298
  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.
  1976 March 27, F. Dudley Hart, “History of the treatment of rheumatoid arthritis”, in British Medical Journal, volume 1, number 6012, page 763
3. Of the eastern churches, Eastern Orthodox.
4. Of a branch of Judaism.
5. (botany) Of pollen, seed, or spores: viable for a long time; viable when dried to low moisture content.