A creature is called Dream Bound if it has a body in a Dream Plane which the creature's spirit is still attached to, so they are still alive in the dream plane, but it no longer has an attachment to a body in the physical world.
Humans can become Dream Bound. The following people end up dream bound in some point of the story:
Lenn [is born dream bound, and rescued by Alexandreil and Quetz'l]
Alexandreil [more than once...born dream bound and rescued by Jonathan, dream bound again with Chathalen to save Jason and Harris]
Desmond Harris [rescued by Jonathan]
Jonathan Landon [trades places with Desmond to give him another chance at life and to be with Dream Bound Alexandreil]