orthodox

[awr-thuh-doks]
adjective
1.
of, pertaining to, or conforming to the approved form of any doctrine, philosophy, ideology, etc.
2.
of, pertaining to, or conforming to beliefs, attitudes, or modes of conduct that are generally approved.
3.
customary or conventional, as a means or method; established.
4.
sound or correct in opinion or doctrine, especially theological or religious doctrine.
5.
conforming to the Christian faith as represented in the creeds of the early church.
6.
(initial capital letter) of, pertaining to, or designating the Eastern Church, especially the Greek Orthodox Church.
7.
(initial capital letter) of, pertaining to, or characteristic of Orthodox Jews or Orthodox Judaism.

Origin:
1575–85; < Late Latin orthodoxus right in religion < Late Greek orthódoxos, equivalent to ortho- ortho- + dóx(a) belief, opinion + -os adj. suffix

orthodoxly, adverb
orthodoxness, noun
antiorthodox, adjective
antiorthodoxly, adverb
hyperorthodox, adjective
nonorthodox, adjective
nonorthodoxly, adverb
pro-orthodox, adjective
semiorthodox, adjective
semiorthodoxly, adverb
ultraorthodox, adjective
unorthodox, adjective


3. traditional, commonplace, routine, fixed.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
orthodox (ˈɔːθəˌdɒks)
 
adj
1.  conforming with established or accepted standards, as in religion, behaviour, or attitudes
2.  conforming to the Christian faith as established by the early Church
 
[C16: via Church Latin from Greek orthodoxos, from orthos correct + doxa belief]
 
'orthodoxly
 
adv

Orthodox (ˈɔːθəˌdɒks)
 
adj
1.  of or relating to the Orthodox Church of the East
2.  (sometimes not capital)
 a.  of or relating to Orthodox Judaism
 b.  (of an individual Jew) strict in the observance of Talmudic law and in personal devotions

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

orthodox
1580s, from L.L. orthodoxus, from Gk. orthodoxos "having the right opinion," from orthos "right, true, straight" (see ortho-) + doxa "opinion, praise," from dokein "to seem," from PIE base *dek- "to take, accept" (see decent). As the name of the
Eastern Church, first recorded in Eng. 1772; in the sense of branch of Judaism, first recorded 1853.
Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Britannica
Encyclopedia

orthodox

(from Greek orthodoxos, "of the right opinion"), true doctrine and its adherents as opposed to heterodox or heretical doctrines and their adherents. The word was first used in early 4th-century Christianity by the Greek Fathers. Because almost every Christian group believes that it holds the true faith (though not necessarily exclusively), the meaning of "orthodox" in a particular instance can be correctly determined only after examination of the context in which it appears.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
According to orthodox science, this can occur only under extreme conditions, as
  in stars or nuclear reactors.
The chimneys in tenement-house alleys were never built on a plan generous
  enough to let him in in the orthodox way.
Xu was candid about the skepticism, even disdain, that his proposal engenders
  among orthodox archaeologists.
More orthodox measures aimed at limiting the franc's rise have proved
  ineffective.
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