A native or inhabitant of Byzantium or of the Byzantine Empire.

Dutch: Byzantijn

Of or relating to the Eastern Orthodox Church or the rites performed in it.

Of or relating to or characteristic of the Byzantine Empire or the ancient city of Byzantium.

Polish: bizancki, bizantyjski, bizantyński

Highly complex or intricate and occasionally devious:
— The Byzantine tax structure.
— Byzantine methods for holding on to his chairmanship.

synonyms: convoluted, involved, knotty, tangled, tortuous.