Definitions from Wiktionary ( )

▸ noun:  (uncountable, literary or poetic) The substance formerly supposed to fill the upper regions of the atmosphere above the clouds, in particular as a medium breathed by deities.
▸ noun:  (by extension) The medium breathed by human beings; the air.
▸ noun:  (by extension) The sky, the heavens; the void, nothingness.
▸ noun:  (uncountable, physics, historical) Often as aether and more fully as luminiferous aether: a substance once thought to fill all unoccupied space that allowed electromagnetic waves to pass through it and interact with matter, without exerting any resistance to matter or energy; its existence was disproved by the 1887 Michelson–Morley experiment and the theory of relativity propounded by Albert Einstein (1879–1955).
▸ noun:  (uncountable, colloquial) The atmosphere or space as a medium for broadcasting radio and television signals; also, a notional space through which Internet and other digital communications take place; cyberspace.
▸ noun:  (uncountable, colloquial) A particular quality created by or surrounding an object, person, or place; an atmosphere, an aura.
▸ noun:  (uncountable, organic chemistry) Diethyl ether (C₄H₁₀O), an organic compound with a sweet odour used in the past as an anaesthetic.
▸ noun:  (countable, organic chemistry) Any of a class of organic compounds containing an oxygen atom bonded to two hydrocarbon groups.
▸ noun:  (uncountable) Starting fluid.
▸ verb:  (transitive, slang) To viciously humiliate or insult.
▸ noun:  (Roman mythology) The god-personification of the bright, glowing upper air of heaven. He is the Roman counterpart of Aether.
▸ noun:  (cryptocurrencies) A unit of the Ethereum digital currency, ETH.
▸ noun:  (Mormonism) The ancient American prophet of Mormon theology who wrote the Book of Ether in the Book of Mormon.
▸ verb:  (UK dialectal) Alternative form of edder [(obsolete, transitive) To bind the top of, interweaving edder.]
▸ noun:  (cryptocurrencies) Alternative letter-case form of Ether [(Roman mythology) The god-personification of the bright, glowing upper air of heaven. He is the Roman counterpart of Aether.]

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