Pertaining to the hypothetical upper, purer air, or to the higher regions beyond the earth or beyond the atmosphere; celestial; as, ethereal space; ethereal regions.
Consisting of ether; hence, exceedingly light or airy; tenuous; spiritlike; characterized by extreme delicacy, as form, manner, thought, etc.
Pertaining to, derived from, or resembling, ether; as, ethereal salts.
Light, airy, heavenly or celestial
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"
of heaven or the spirit; "celestial peace"; "ethereal melodies"; "the supernal happiness of a quiet death"
characterized by unusual lightness and delicacy; "this smallest and most ethereal of birds"; "gossamer shading through his playing"
Heavenly or clestial, from the word "ether," an imaginary substance filling all space beyond earth, or the hypothetical medium in space for transmitting light waves and radiant energy.
Something perceived to be real but doesn't have a physical presence; intangible.