Then the king commanded to call the magicians, and the astrologers, and the sorcerers, and the Chaldeans, for to shew the king his dreams. So they came and stood before the king. The magicians - חרטמים chartummim. See the note on Genesis 41:8 (note).
The astrologers - אשפים ashshaphim. Perhaps from נשף nashaph, to breathe, because they laid claim to Divine inspiration; but probably the persons in question were the philosophers and astronomers among the Babylonians.
The sorcerers - מכשפים mechashshephim. See the note on Deuteronomy 18:10, and on Exodus 22:18 (note), and Leviticus 19:31 (note), where several of these arts are explained.
The Chaldeans - Who these were is difficult to be ascertained. They might be a college of learned men, where all arts and sciences were professed and taught. The Chaldeans were the most ancient philosophers of the world; they might have been originally inhabitants of the Babylonian Irak; and still have preserved to themselves exclusively the name of Chaldeans, to distinguish themselves from other nations and peoples who inhabited the one hundred and twenty provinces of which the Babylonish government was composed.