ether

1. (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.Examples: "On Wings the Birds through Æther glide, / And Fiſhes cut with Fins the Tide."broadlycountableliterarypoeticuncountable

2. (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.Examples: "Take a snapshot of the conflicts around the world: Sunnis vs. Shiites, Israelis vs. Palestinians, Serbs vs. Kosovars, Indians vs. Pakistanis. They seem to be driven by religious hatred. It’s enough to make you wonder if the animosity would melt away if all religions were suddenly, somehow, to vanish into the ether. But James Carse doesn’t see them as religious conflicts at all. To him, they are battles over rival belief systems, which may or may not have religious overtones."; "In barely the blink of an eye, the perfectly healthy Judy entered a permanent vegetative state. […] What haunted me was the idea that one moment you’re gazing at your 2-year-old in her playroom and the next, you, the mother, have been whisked off into the ether forever."; "There’s a very real chance that, rather than crumbling into the dust and floating off into the ether, Thanos’s victims [in the film Avengers: Infinity War] were actually sucked up into the Soul Stone."broadlycountableliterarypoeticuncountable

3. (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).Examples: "I ſuppose this æther pervades all groſs bodies, but yet ſo as to ſtand rarer in their pores than in free ſpaces, and ſo much the rarer, as their pores are leſs. And this I ſuppose (with others) to be the cauſe, why light incident on thoſe bodies is refracted towards the perpendicular; […] I ſuppose the rarer æther within bodies, and then denſer without them, not to be terminated in a mathematical ſuperficies, but to grow gradually into one another; […]"; "Having ſhewn how the Æther cauſes a great part of the Phænomena of Nature, it may be aſked, whence this general material Cauſe has its great Activity and Power? […] This Cauſe muſt be either Matter or Spirit, there being nothing in the Univerſe, which we know if, beſides theſe two. But this Cauſe cannot be Matter: for Matter is in own Nature inert, and has not any Activity in itſelf; and conſequently cannot communicate any Power to the Æther. And therefore the Cauſe, which gives the Æther its Activity and Power, muſt be Spirit. Spirit, which intercedes the Particles of Æther, and gives them a repulſive Power, and ordains and executes the Laws, by which Æther and Bodies act mutually on one another, muſt be preſent in all Parts of Space, where there is Æther."; "The whole matter of the univerſe may be divided into atoms and æther. […] The latter, æther, is a ſubtile elaſtic fluid, whoſe particles have a continual tendency to ſeparate or fly off every way, unleſs impreſſed by ſome body: This æther ſurrounds each atom like an atmoſphere, and preſſes equally towards the center of each."historicaluncountable

4. (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.Examples: "H. P. Lovecraft, At the Mountains of Madness He held some friendly chat with Pabodie over the ether, and repeated his praise of the really marvelous drills that had helped him make his discovery."; "Now we are liberal with our innermost secrets, spraying them into the public ether with a generosity our forebears could not have imagined. Where we once sent love letters in a sealed envelope, or stuck photographs of our children in a family album, now such private material is despatched to servers and clouds operated by people we don't know and will never meet."colloquialuncountable

5. (uncountable, colloquial) A particular quality created by or surrounding an object, person, or place; an atmosphere, an aura.Examples: "The luminous æther of his life was not obſcured by any ſhade dark enough to be denominated a defect."colloquialuncountable

6. (uncountable, organic chemistry) Diethyl ether (C₄H₁₀O), an organic compound with a sweet odour used in the past as an anaesthetic.Examples: "But the moſt valuable Qualities of the ÆTHER are it's medicinal ones; it having been found by repeated Experience to be an excellent Remedy in moſt nervous Diſeaſes; particularly in Fits of all ſorts, whether Epileptic, Convulſive, Hyſteric, Hypochondriac, or Paralytic: […]"; "The only thing that really worried me was the ether. There is nothing in the world more helpless and irresponsible and depraved than a man in the depths of an ether binge."uncountable