definition of
ethereal

[1] #1 ethereal s. [aeriform, aerial, airy, aery] 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". wn

[2] #2 ethereal a. of or containing or dissolved in ether; "ethereal solution". wn

[3] #3 ethereal s. [celestial, supernal] of heaven or the spirit; "celestial peace"; "ethereal melodies"; "the supernal happiness of a quiet death". wn

[4] #4 ethereal s. [gossamer] characterized by unusual lightness and delicacy; "this smallest and most ethereal of birds"; "gossamer shading through his playing". wn