Definition of "interdimensional"

interdimensional

adjective
not comparable
1. Between dimensions.
noun
plural interdimensionals
1. (science fiction) A hypothetical being that can move between dimensions.
  Quotations
  By their own mysterious yardstick, extraterrestrials and interdimensionals choose the most unlikely individuals for close encounters of the third kind on up: for starters Gilliland, Whitley Strieber, Jim Moroney, Betty and Barney Hill.
  2012, Richard Grossinger, Dark Pool of Light, Volume Three: The Crisis and Future of Consciousness‎