Noun

(organic compound, countable) A compound containing an oxygen atom bonded to two hydrocarbon groups.

(organic compound, uncountable) Diethyl ether (C₄H₁₀O), a compound used as an early anaesthetic.

(ancient philosophy, and, alchemy, uncountable) A classical physical element, considered as prevalent in the heavens and inaccessible to humans. In some versions of alchemy, this was the fifth element in addition to air, earth, fire and water.

(archaic, physics, uncountable) A substance (aether ) once thought to fill all space that allowed electromagnetic waves to pass through it and interact with matter, without exerting any resistance to matter or energy (disproved by Einstein in his Theory of Relativity).

* {{quote-magazine, date=2013-06-14, author=(Jonathan Freedland)

, volume=189, issue=1, page=18, magazine=(The Guardian Weekly) , title= Obama's once hip brand is now tainted , passage=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.}}

The sky or heavens; the upper air.

Noun

(head) (p)

*1918 : John Herbert Parsons, Mind and the Nation: a précis of applied psychology , p23

*:From them sprang, all with a sense of dividing and mapping out boundaries, Moira (Destiny) and Nomos (Law), Nemos (Sanctuary) and Nemesis (Avenging Anger or Righteous Indignation), Ethea , the haunts of the country in which one ranges, and so customs, established behaviour, habits.

*1984 : Eva Hauel Cadwallader, Searchlight on Values: Nicolai Hartmann’s Twentieth-century Value Platonism , p93

*:Hartmann means this interpretation of what most would call historical historical relativism to apply also to the contemporaneous diversity of ethea among cultures, sub-cultures, and (evidently) individuals who adopt the viewpoint of one of these.

*1994 : Richard T. Hull, A Quarter Century of Value Inquiry , p180

*:These three valuational attitudes form a triangle of mutually opposing ethea .

*1996 : Charles E. Scott, On the Advantages and Disadvantages of Ethics and Politics , p46

*:The question arises from a limited ethos combined with its universalization, which transgresses its own limits, and its claim to authority over other ethea .

*1997 : Charles Olson et alii, Collected Prose , p358

*:A politics of the order of the Athenian Three has no more person or ethea in it — has only a psyche of halve to logos and their false conjunction supported by an invented episteme, an invented noun instead of a participle…

*2004 : Michael J. Hyde, The Ethos of Rhetoric , pXVI

*:This question echoes the earliest use of ethos that dates back to Homer and Hesiod, influences Isocrates’ theory of rhetoric and moral character, and, as Charles Chamberlain notes, “refers to the range or arena where someone is most truly at home and which underlies all the fine appearances [‘habits’ and ‘customs’: also ethea ] that people adopt”.

*2006 : Chanju Mun, Buddhism And Peace: Theory And Practice , p224

*:The place of this region is called the ethea of animals and refers to the place outside the domain of Greek culture, to the place of the barbarian who resists domestication.