Cartoon, abbreviated, from which the primary meaning is derived

Toontown Online, an online computer role-playing game.

Platoon, A military unit.

Toon is a term that commonly refers to a type of character appearing in certain cartoons. It can also mean:

Toon, a tree in the genus Toona

Avatar (computing), referring to the cartoon image of a player's digital avatar in MMORPGs

Newcastle, for "town" in the English Geordie dialect

Newcastle United F.C., a local football team also nicknamed "The Toon"

Toon (role-playing game), a role-playing game published by Steve Jackson Games in which the players take the parts of cartoon characters

Tōon, Ehime, a Japanese city in Ehime Prefecture