(Hebrew בעלים) Baalim is plural, from Baal "Mister, Sir."

"And the children of Israel did evil in the sight of the LORD, and served the Baalim..." - Judges 2:11

"The schools of the Baalim were instituted in the abyss by humanity. These are all the pseudo-spiritual schools that actually exist in the world. All such external schools are from the abyss. If man wants to leave the abyss he must liberate his mind from all these cages. When we penetrate into the internal worlds we find all the students of the schools of Baalim submerged in the profound darkness of black magic. These poor beings are searching outwardly for what they already have inside. All such souls continue to rebel against the commands of the Lord Jehovah, eating the forbidden fruit, of which He said, “you shall not eat.” It is painful to see these souls enslaved by the Baalim. The Baalim are black magicians." - Igneous Rose by Samael Aun Weor