'Byzantium' definitions:

Definition of 'Byzantium'

(from WordNet)
noun
An ancient city on the Bosporus founded by the Greeks; site of modern Istanbul; in 330 Constantine I rebuilt the city and called it Constantinople and made it his capital
noun
A continuation of the Roman Empire in the Middle East after its division in 395 [syn: Byzantine Empire, Byzantium, Eastern Roman Empire]

Definition of 'Byzantium'

From: GCIDE
  • Byzantium \Byzantium\ prop. n. An ancient city on the Bosphorus founded by the Greeks. It was later renamed Constaninople in honor of the emperor Constantine, and renamed Istanbul by the Turks, which name it still retains. [WordNet 1.5]