Ethereal

1. adjective

   characterized by lightness and insubstantiality; as impalpable or intangible as air; - Thomas Carlyle

   “figures light and aeriform come unlooked for and melt away”

   Similar: aeriform, aerial, airy, aery

2. adjective

   characterized by unusual lightness and delicacy

   “this smallest and most ethereal of birds”

   Similar: gossamer

3. adjective

   of or containing or dissolved in ether

   “ethereal solution”

4. adjective

   of heaven or the spirit

   “celestial peace”

   Similar: celestial, supernal