(Gr. form Beel'zebul), the name given to Satan, and found only in the New Testament (Matthew 10:25; 12:24, 27; Mark 3:22). It is probably the same as Baalzebub (q.v.), the god of Ekron, meaning "the lord of flies," or, as others think, "the lord of dung," or "the dung-god."

Noah Webster's New International Dictionary of the English Language

(n.) The title of a heathen deity to whom the Jews ascribed the sovereignty of the evil spirits; hence, the Devil or a devil. See Baal.