Thayer's Greek Lexicon

 Babylon = "confusion"
1. a very large and famous city, the residence of the Babylonian
kings, situated on both banks of the Euphrates. Cyrus had formerly
captured it, but Darius Hystaspis threw down its gates and walls,
and Xerxes destroyed the temple of Belis. At length the city was
reduced to almost solitude, the population having been drawn off
by the neighbouring Seleucia, built on the Tigris by Seleucus
Nicanor.
2. of the territory of Babylonia
3. allegorically, of Rome as the most corrupt seat of idolatry and the
enemy of Christianity