'In the World' in the Bible

Now there were then staying in Jerusalem religious Jews from every country in the world;

There is no salvation through anyone else, for there is no one else in the world who has been named to men as their only means of being saved."

The man replied, "How in the world can I, unless someone guides me?" So he invited Philip to come up and sit with him.

When the city recorder had quieted the crowd, he said, "Men of Ephesus, who in the world doesn't know that this city of Ephesus is the keeper of the temple of the great Artemis and of the statue that fell down from heaven?