Source : Webster's Revised Unabridged Dictionary (1913)

Baal \Ba"al\ (b[=a]"al), n.; Heb. pl. {Baalim} (-[i^]m). [Heb.
   ba'al lord.]
   1. (Myth.) The supreme male divinity of the Phoenician and
      Canaanitish nations.

   Note: The name of this god occurs in the Old Testament and
         elsewhere with qualifying epithets subjoined, answering
         to the different ideas of his character; as,
         Baal-berith (the Covenant Baal), Baal-zebub (Baal of
         the fly).

   2. pl. The whole class of divinities to whom the name Baal
      was applied. --Judges x. 6.

Bel \Bel\ (b[e^]l), n.
   The Babylonian name of the god known among the Hebrews as
   {Baal}. See {Baal}. --Baruch vi. 41.

Source : WordNet®

Baal
     n : any of numerous local fertility and nature deities
         worshipped by ancient Semitic peoples; the Hebrews
         considered Baal a false god