A temporal substance or picture of a being. It is temporal because it is essentially the bridge between the physical and the astral body. The sense organs of the etheric body are the chakras. It is through the chakras that the physical body is supplied with the vitality necessary for its existence and well-being. It is the etheric body (or etheric double), that produces one's aura.
At the moment of final physical death, a tremendous amount of psychic and spiritual energy becomes released. This burst of psychic and spiritual energy is ethereal in form.