Ethereal

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Ethereal

(a.) 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.
(a.) Consisting of ether; hence, exceedingly light or airy; tenuous; spiritlike; characterized by extreme delicacy, as form, manner, thought, etc.
(a.) Pertaining to, derived from, or resembling, ether; as, ethereal salts.