Source : Webster's Revised Unabridged Dictionary (1913)

Babylonian \Bab`y*lo"ni*an\, a.
   Of or pertaining to the real or to the mystical Babylon, or
   to the ancient kingdom of Babylonia; Chaldean.

Babylonian \Bab`y*lo"ni*an\, n.
   1. An inhabitant of Babylonia (which included Chaldea); a
      Chaldean.

   2. An astrologer; -- so called because the Chaldeans were
      remarkable for the study of astrology.

Source : WordNet®

Babylonian
     adj : of or relating to the city of Babylon or its people or
           culture; "Babylonian religion"

Babylonian
     n 1: an inhabitant of ancient Babylon
     2: the ideographic and syllabic writing system in which the
        ancient Babylonian language was written