'World' in the Bible

Now it came about in those days that an order went out from Caesar Augustus that there was to be a numbering of all the world.

For what profit will a man have if he gets all the world, but undergoes loss or destruction himself?

For the nations of the world go in search of all these things: but your Father has knowledge that you have need of them.

And his lord was pleased with the false servant, because he had been wise; for the sons of this world are wiser in relation to their generation than the sons of light.

Who will not get much more in this time, and in the world to come, eternal life.

And Jesus said to them, The sons of this world are married and have wives;

But those to whom is given the reward of the world to come, and to come back from the dead, have no wives, and are not married;