• a sharp fragment of material, usually wood, metal, or fiberglass, see wiktionary entry for splinter
• Splinter or Schism (organizational), a division of an organization or movement into two, the smallerknown as a splinter.

It may also refer to:

Music

• Splinter (Bob Purvis and Bill Elliott), recording artists
• Splinter (Sneaker Pimps album), released 1999.
• Splinter (The Offspring album), released 2003.

Characters

• Splinter (TMNT), a character from the Teenage Mutant Ninja Turtles series
• Splinter, an insect-like creature in the Nintendo game Metroid Prime 2: Echoes
• Splinter, Woody Woodpecker's niece

Other

• Splinter (2008 film), a 2008 horror film
• Splinter, an American supercar made of wood
• Splinter, a popular nickname of Greek basketball player Vassilis Spanoulis
• Splinter, an episode of the TV series Smallville.
• Splinter bid, a type of bid in contract bridge