1.  The void between the supernal sephiroth and the lower sephiroth on the Tree of Life that separates the ideal and the real.

2.  A division on the Tree of Life separating the top three sephiroth from the rest of the Tree. A separation of the noumenal from the phenomenal, and the perceived separation between the upper, unmanifest, trinity of Kether, Chokmah and Binah, and the lower seven Sephiroth that are manifest. It is believed that only adepts can access those higher levels.