Orthodox

Orthodox, Orthodoxy, or Orthodoxism may refer to:

Religion

Orthodoxy, adherence to accepted norms, more specifically adherence to creeds, especially within Christianity and Judaism, but also less commonly in non-Abrahamic religions like Neo-paganism or Hinduism

Eastern Orthodoxy, which accepts the theological resolutions of the Council of Chalcedon
Oriental Orthodoxy, which does not accept the theological resolutions of the Council of Chalcedon

Lutheran orthodoxy, an era in the history of Lutheranism which began in 1580 from the writing of the Book of Concord
Neo-orthodoxy, a theological position also known as dialectical theology
Orthodox Presbyterian Church, a confessional Presbyterian denomination located primarily in the northern United States
Paleo-orthodoxy, (20th–21st century), a movement in the United States focusing on the consensus among the ecumenical councils and church fathers
Reformed Orthodoxy (16th–18th century), a systematized, institutionalized and codified Reformed theology
True Orthodox church, also called Old Calendarists, a movement that separated from the mainstream Eastern Orthodox Church in the 1920s over issues of ecumenism and calendar reform

Proto-orthodox Christianity, a term coined by New Testament scholar Bart D. Ehrman to describe the Early Christian movement which was the precursor of Christian orthodoxy

Orthodox Bahá'í Faith, a small Baha'i denomination
Orthodox Islam, generally refers to Sunni Islam
Orthodox Judaism, a branch of Judaism
- Haredi Judaism, groups within Orthodox Judaism that reject modern secular culture
  - Hasidic Judaism, a sub-group within Haredi Judaism noted for its religious conservatism and, typically, social seclusion
- Modern Orthodox Judaism, is a movement within Orthodox Judaism
Kemetic Orthodoxy, an Egyptian neo-pagan religion that intends to reform and restore ancient Egyptian religion
Slavic Native Faith or Orthodoxy, a term used by Neo-Slavic pagan religious organizations

Left-arm orthodox spin, a bowling technique in cricket
Orthodox (album), a 2013 album by American rock band Beware of Darkness
Orthodox (band), an American metalcore band from Tennessee.
Orthodox File Managers, a user interface to work with file systems
Orthodox (Jordan), a Jordanian basketball club
Orthodox Marxism, the dominant form of Marxist philosophy between the death of Karl Marx and the beginning of World War I
Orthodox seed, a seed which may be preserved via drying or freezing
Orthodox stance, a way of positioning the feet and hands in combat sports