1) American fantasy novel 2) Cyborg in literature 3) Fictional language 
InterWorld is a fantasy and science fiction novel by Neil Gaiman and Michael Reaves. The book was published in 2007 in literature by EOS, an imprint of HarperCollins Publishers. It follows the story of Joey Harker who, together with a group of other Joeys from different Earths in other parallel universes, try to stop the two forces of magic and sc...
• (n.) A world between other worlds.
In`ter·world' noun A world between other worlds. Holland.