Thayer's Greek Lexicon

 1. a woman who sells her body for sexual uses
  1) a prostitute, a harlot, one who yields herself to defilement
for the sake of gain
  2) any woman indulging in unlawful sexual intercourse, whether
for gain or for lust
2. metaph. an idolatress
  1) of "Babylon" i.e. Rome, the chief seat of idolatry