'World' in the Bible

It is like a mustard-seed, which, when sown in the earth, is the smallest of all the seeds in the world;

Why, what does it benefit a man to gain the whole world and forfeit his life?

For those will be times of suffering the like of which has never been from the first creation of God's world until now, and assuredly never will be again;

And I solemnly tell you that wherever in the whole world the Good News shall be proclaimed, this which she has done shall also be told in remembrance of her."

Then He said to them, "Go the whole world over, and proclaim the Good News to all mankind.