'Lord's' in the Bible

Behold, the money, which we found in our sacks' mouths, we brought again to you out of the land of Canaan. How then should we steal silver or gold out of your lord's house?

With whoever of your servants it be found, let him die, and we also will be my lord's bondservants."

Judah said, "What will we tell my lord? What will we speak? Or how will we clear ourselves? God has found out the iniquity of your servants. Behold, we are my lord's bondservants, both we, and he also in whose hand the cup is found."

Then Judah came near to him, and said, "Oh, my lord, please let your servant speak a word in my lord's ears, and don't let your anger burn against your servant; for you are even as Pharaoh.

When that year was ended, they came to him the second year, and said to him, "We will not hide from my lord how our money is all spent, and the herds of livestock are my lord's. There is nothing left in the sight of my lord, but our bodies, and our lands.