(n)an ancient region of Mesopotamia lying between the Euphrates delta and the Persian Gulf and the Arabian Desert; settled in 1000 BC and destroyed by the Persians in 539 BC; reached the height of its power under Nebuchadnezzar II, Syn.Chaldaea
a. [ L. Chaldaeus. ] Of or pertaining to Chaldea. -- n. (a) A native or inhabitant of Chaldea. (b) A learned man, esp. an astrologer; -- so called among the Eastern nations, because astrology and the kindred arts were much cultivated by the Chaldeans. (c) Nestorian. [ 1913 Webster ]