Byzantine Definition

1. historical
Relating to Byzantium (later Constantinople and now the city of Istanbul, in Turkey) or the eastern part of the Roman Empire from ad 395 to 1453.
2. Belonging or relating to the style of architecture and painting, etc developed in the Byzantine Empire, with domes, arches, stylized mosaics and icons, etc.
3. Belonging or relating to the Byzantine Church, ie the Eastern or Orthodox Church.
4. Secret, difficult to understand, and extremely intricate and complex; tortuous.
5. Said eg of attitudes or policies: rigidly hierarchic; inflexible.

historical:
1. An inhabitant of Byzantium.