'Master' in the Bible

And there fell some of Manasseh to David, when he came with the Philistines against Saul to battle: but they helped them not: for the lords of the Philistines upon advisement sent him away, saying, He will fall to his master Saul to the jeopardy of our heads.

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 fine linen, and all the Levites that bare the ark, and the singers, and Chenaniah the master of the song with the singers: David also had upon him an ephod of linen.

Joab replied, "May the Lord make his army a hundred times larger! My master, O king, do not all of them serve my master? Why does my master want to do this? Why bring judgment on Israel?"

Ornan told David, "You can have it! My master, the king, may do what he wants. Look, I am giving you the oxen for burnt sacrifices, the threshing sledges for wood, and the wheat for an offering. I give it all to you."