Meteoroid, Meteor and Meteorite... What are the differences?

Anynobody, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons

This Wikimedia Commons illustration shows a meteoroid entering the atmosphere, becoming visible as a meteor and hitting the Earth's surface as a meteorite. The distinctions are used to describe the same object in various stages.