'Master' in the Bible

So now I have sent a skilled man, knowledgeable [and with] understanding: my master Huram,

Even so, Nebat's son Jeroboam, who used to serve David's son Solomon, rose in rebellion against his own master!

Then he said, I did see all Israel scattered upon the mountains, as sheep that have no shepherd: and the LORD said, These have no master; let them return therefore every man to his house in peace.