The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

   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).
         [1913 Webster]

   2. pl. The whole class of divinities to whom the name Baal
      was applied. --Judges x. 6.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bel \Bel\, n.
   The Babylonian name of the god known among the Hebrews as
   Baal. See Baal. --Baruch vi. 41.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Baal
    n 1: any of numerous local fertility and nature deities
         worshipped by ancient Semitic peoples; the Hebrews
         considered Baal a false god

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "Baal":
   Adad, Adapa, Anu, Anunaki, Ashtoreth, Ashur, Astarte, Beltu, Ceres,
   Dagon, Damkina, Demeter, Dionysus, Dumuzi, Ea, Enlil, Ereshkigal,
   Frey, Gibil, Girru, Gish Bar, Gishzida, Gula, Igigi, Inanna,
   Isimud, Isis, Juggernaut, Ki, Lahmu, Mama, Marduk, Merodach,
   Moloch, Nabu, Nammu, Namtar, Nanna, Nebo, Nergal, Neti, Nina,
   Ningal, Ningirsu, Ninhursag, Ninlil, Ninmah, Ninsar, Nintoo, Nusku,
   Pan, Papsukai, Priapus, Ramman, Shala, Shamash, Sin, Utnapishtim,
   Uttu, Utu, Zarpanit, Zubird, devil-god, fetish, golden calf,
   graven image, idol, joss



Easton's 1897 Bible Dictionary:

Baal
   lord. (1.) The name appropriated to the principal male god of
   the Phoenicians. It is found in several places in the plural
   BAALIM (Judg. 2:11; 10:10; 1 Kings 18:18; Jer. 2:23; Hos. 2:17).
   Baal is identified with Molech (Jer. 19:5). It was known to the
   Israelites as Baal-peor (Num. 25:3; Deut. 4:3), was worshipped
   till the time of Samuel (1 Sam 7:4), and was afterwards the
   religion of the ten tribes in the time of Ahab (1 Kings
   16:31-33; 18:19, 22). It prevailed also for a time in the
   kingdom of Judah (2 Kings 8:27; comp. 11:18; 16:3; 2 Chr. 28:2),
   till finally put an end to by the severe discipline of the
   Captivity (Zeph. 1:4-6). The priests of Baal were in great
   numbers (1 Kings 18:19), and of various classes (2 Kings 10:19).
   Their mode of offering sacrifices is described in 1 Kings
   18:25-29. The sun-god, under the general title of Baal, or
   "lord," was the chief object of worship of the Canaanites. Each
   locality had its special Baal, and the various local Baals were
   summed up under the name of Baalim, or "lords." Each Baal had a
   wife, who was a colourless reflection of himself.

     (2.) A Benjamite, son of Jehiel, the progenitor of the
   Gibeonites (1 Chr. 8:30; 9:36).

     (3.) The name of a place inhabited by the Simeonites, the same
   probably as Baal-ath-beer (1 Chr. 4:33; Josh. 19:8).


Hitchcock's Bible Names Dictionary (late 1800's):

Baal, master; lord


The Devil's Dictionary (1881-1906):

BAAL, n.  An old deity formerly much worshiped under various names.
As Baal he was popular with the Phoenicians; as Belus or Bel he had
the honor to be served by the priest Berosus, who wrote the famous
account of the Deluge; as Babel he had a tower partly erected to his
glory on the Plain of Shinar.  From Babel comes our English word
"babble."  Under whatever name worshiped, Baal is the Sun-god.  As
Beelzebub he is the god of flies, which are begotten of the sun's rays
on the stagnant water.  In Physicia Baal is still worshiped as Bolus,
and as Belly he is adored and served with abundant sacrifice by the
priests of Guttledom.