'World' in the Bible

What profit will a person have if he gains the whole world and forfeits his life?

who will not receive a hundred times as much here in this world homes, brothers, sisters, mothers, children, and fields, along with persecution as well as eternal life in the age to come.

I tell all of you with certainty, wherever the gospel is proclaimed in the whole world, what she has done will also be told as a memorial to her."

Then he told them, "As you go into the entire world, proclaim the gospel to everyone.