All 4 Uses

New World
in
Nation, by Terry Pratchett
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Imo thought this was a good idea, because it was his own creation, and went off to make his new world in the sky.†
Chpt 1. *
CHAPTER 2 — The New World†
Chpt 2.
They were made of stone, indeed, but they had gleamed in their hidden home, and he was sure they had spoken to him, told him that everything he believed was true, and that in this new world he would be their prophet, delivered out of the darkness on the burning wings of certainty.†
Chpt 10.
It's a new world.†
Chpt 15.

Definitions:

(1) (New World as in: Columbus's voyage to the New World)
the Americas (North, South, and Central with nearby islands) (also known as the Western Hemisphere -- which was new to Europe in the 16th century)
(2) (meaning too common or too rare to warrant focus)
More commonly, new world can refer to the non-specific meaning of the most basic sense of the words.