'Master' in the Bible

Once when they were with Him, they asked Him, "Master, is this the time at which you are about to restore the kingdom of Israel?"

When they heard this, they all raised their voices to God and said, “Master, You are the One who made the heaven, the earth, and the sea, and everything in them.

and said, “You [Elymas] who are full of every [kind of] deceit, and every [kind of] fraud, you son of the devil, enemy of everything that is right and good, will you never stop perverting the straight paths of the Lord?

Nevertheless the centurion believed the master and the owner of the ship, more than those things which were spoken by Paul.

For this night there came to my side an angel of the God who is my Master and whose servant I am,