The term "New World" is used to describe the majority of lands of Earth's Western Hemisphere, particularly the Americas. The term gained prominence in the early 16th century during Europe's Age of Discovery, after Italian explorer Amerigo Vespucci published the Latin-language pamphlet Mundus Novus, presenting his conclusion that these lands, soon called America based on Amerigo's name, constitute a new continent.

The Americas, sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World.