'Master' in the Bible

And some of the men of Manasseh came over to David, when he went with the Philistines to the war against Saul, but he gave them no help: for the lords of the Philistines, after discussion, sent him away, saying, He will go back to his master Saul, at the price of our lives.

And Chenaniah, chief of the Levites, was master of the music: he gave directions about the song, because he was expert.

And David was clothed with a robe of fair linen, as were all the Levites who took up the ark, and those who made melody, and Chenaniah the master of those who made melody; and David had on a linen ephod;