A globetrotter is a world traveler. Your uncle the globetrotter might be famous in your family for giving lengthy slideshows of photos from his travels.
You're not a globetrotter if you never leave your neighborhood, and you're not a globetrotter if you visited Paris once, years ago. Globetrotter is an informal word for someone who travels a lot, and to many varied places around the world. The earliest use of globetrotter, from the 1870s, sometimes specified a person who tries to set or beat a record for the most ground covered or countries visited.