constantinople(n = noun.location)istanbul, stamboul, stambul - the largest city and former capital of Turkey; rebuilt on the site of ancient Byzantium by Constantine I in the fourth century; renamed Constantinople by Constantine who made it the capital of the Byzantine Empire; now the seat of the Eastern Orthodox Church;
constantinople(n = noun.group)fourth council of constantinople - the council in 869 that condemned Photius who had become the patriarch of Constantinople without approval from the Vatican, thereby precipitating the schism between the eastern and western churches;
the former capital of the Eastern Roman Empire; it was built on the site of ancient Byzantium, and the name was changed to Istanbul by the Turks. [WordNet 1.5]