[Chal.de.an] n [L Chaldaeus Chaldean, astrologer, fr. Gk Chaldaios, fr. Chaldaia Chaldea, region of ancient Babylonia] (1581) 1 a: a member of an ancient Semitic people that became dominant in Babylonia b: the Semitic language of the Chaldeans
2: a person versed in the occult arts -- Chaldean adj