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1. Extremely light or delicate: "An ant lion ... is lovely, long-bodied like a damselfly, with a pair of ethereal wings" (Jennifer Ackerman).
a. Of the celestial spheres; heavenly.
b. Spiritual or otherworldly.
3. Chemistry Of or relating to ether.
[From Latin aetherius, from Greek aitherios, from aithēr, upper air.]
e·the′re·al′i·ty (-ăl′ĭ-tē), e·the′re·al·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.