[adj] characterized by lightness and insubstantiality; as impalpable or intangible as air; "figures light and aeriform come unlooked for and melt away"- Thomas Carlyle; "aerial fancies"; "an airy apparition"; "physical rather than ethereal forms"
[adj] characterized by unusual lightness and delicacy; "this smallest and most ethereal of birds"; "gossamer shading through his playing"
[adj] of heaven or the spirit; "celestial peace"; "ethereal melodies"; "the supernal happiness of a quiet death"
[adj] (chemistry) of or containing or dissolved in ether; "ethereal solution"
aerial, aeriform, aery, airy, celestial, delicate, gossamer, heavenly, insubstantial, supernal, unreal, unsubstantial