'Lord's' in the Bible

They were continually and faithfully devoting themselves to the instruction of the apostles, and to fellowship, to eating meals together and to prayers.

Day after day they met in the temple [area] continuing with one mind, and breaking bread in various private homes. They were eating their meals together with joy and generous hearts,

Now on the first day of the week (Sunday), when we were gathered together to break bread (share communion), Paul began talking with them, intending to leave the next day; and he kept on with his message until midnight.

And since he would not be dissuaded, we stopped pleading and fell silent, saying, “The Lord’s will be done!”