Definition of ether
1a
: the rarefied element formerly believed to fill the upper regions of space
b
: the upper regions of space : heavens
2a
: a light volatile flammable liquid C4H10O used chiefly as a solvent and especially formerly as an anesthetic
b
: any of a class of organic compounds characterized by an oxygen atom attached to two carbon atoms
b
: airwaves
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Merriam-Webster unabridged
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Time Traveler for ether
The first known use of ether was in the 14th century
See more words from the same century