Orthodox adjective 4noun 2forms 3 adjective4 •Of or pertaining to the Orthodox Churches collectively. •Of or pertaining to a particular Orthodox Church, usually the Eastern Orthodox Church, sometimes the Oriental Orthodox Church or the Church of the East. •(Judaism) Of or pertaining to Orthodox Judaism. •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. — 2006 noun2 •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. — 1891 •(rare) An Orthodox Jew. formsOrthodoxes · more Orthodox · most Orthodox