orthodox

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Adhering to the accepted or traditional and established faith, especially in religion.
• adjective Adhering to the Christian faith as expressed in the early Christian ecumenical creeds.
• adjective Of or relating to any of the churches or rites of the Eastern Orthodox Church.
• adjective Of or relating to Orthodox Judaism.
• adjective Adhering to what is commonly accepted, customary, or traditional.
• noun One that is orthodox.
• noun A member of an Eastern Orthodox church.

from The Century Dictionary.

• Holding what is regarded as the correct opinion, or correct opinions, especially in regard to religious or theological doctrines; sound in opinion or doctrine; specifically, conforming to the faith of the Church Catholic, as represented in its primitive ecumenical creeds: applied to persons or doctrines.
• [capitalized] Of or pertaining to the Greek Church.
• Synonyms Orthodox, Evangelical. (See the definitions of these terms.) It is natural for all who care about their doctrinal beliefs to claim the titles that indicate correctness of belief. Hence orthodox is a part of the name of the Greek Church; to the Roman Catholic orthodox means faithful to the tenets of the Roman Church; in the doctrinal contests of America orthodox has generally meant Calvinistic, especially as opposed to Unitarianism and Universalism; in England it has as generally meant High-church, as opposed to Low-church or evangelical. Evangelical, meaning in harmony with the Gospel, has been claimed somewhat similarly and for a like reason, but has been especially applied to those who emphasize the doctrine of salvation by faith in Christ alone.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Sound in opinion or doctrine, especially in religious doctrine; hence, holding the Christian faith; believing the doctrines taught in the Scriptures; -- opposed to heretical and heterodox.
• adjective According or congruous with the doctrines of Scripture, the creed of a church, the decree of a council, or the like
• adjective Adhering to generally approved doctrine or practices; conventional. Opposed to unorthodox.
• adjective Of or pertaining to the churches of the Eastern Christian rite, especially the Greek Orthodox or Russian Orthodox churches, which do not recognize the supremacy of the Pope of Rome in matters of faith.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Adhering to whatever is traditional, customary or generally accepted.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective adhering to what is commonly accepted
• adjective of or relating to or characteristic of the Eastern Orthodox Church
• adjective of or pertaining to or characteristic of Judaism