Barzakh, a barrier or isthmus, is in the Qurʾān the boundary between two seas and the state of souls between death and judgement. Ibn ʿArabī made it a key concept for every intermediary: imagination between spirit and body, the perfect human between God and the world.
Barzakh
Isthmus: an intermediate reality between two others, such as the world between death and resurrection.
Also: Barzakh