• (RP) IPA: /ˈiːθə/
  • (GA) IPA: /ˈiθɚ/


  1. (uncountable, literary or poetic) The substance formerly supposed to fill#Verb|fill the upper#Adjective|upper regions of the atmosphere above the cloud#Noun|clouds, in particular as a medium#Noun|medium breathed by deities.
    1. (by extension) The medium breathed by human beings; the air#Noun|air.
    2. (by extension) The sky, the heavens; the void#Noun|void, nothingness.
  2. (uncountable, physics, historical) Often as aether and more fully as luminiferous aether: a substance once thought to fill all unoccupied space#Noun|space that allowed electromagnetic waves to pass through it and interact with matter#Noun|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).
  3. (uncountable, colloquial) The atmosphere or space as a medium for broadcast#Verb|broadcasting radio and television signal#Noun|signals; also, a notional space through which Internet and other digital communications take place; cyberspace.
  4. (uncountable, colloquial) A particular quality#Noun|quality created by or surrounding an object#Noun|object, person, or place#Noun|place; an atmosphere, an aura.
  5. (uncountable, organic compound) Diethyl ether (Csub 4Hsub 10O), an organic compound with a sweet#Adjective|sweet odour used in the past as an anaesthetic.
  6. (countable, organic compound) Any of a class#Noun|class of organic compounds containing an oxygen atom bond#Verb|bonded to two hydrocarbon group#Noun|groups.
Translations Translations Translations
  • Italian: etere
  • Portuguese: éter
  • Russian: эфи́р
Translations Verb

ether (ethers, present participle ethering; past and past participle ethered)

  1. (transitive, slang) To viciously humiliate or insult#Verb|insult.
    Synonyms: Thesaurus:abash
    The battle rapper ethered his opponent and caused him to slink away in shame.

Proper noun
  1. (Roman god) The god-personification of the bright, glowing upper air of heaven. He is the Roman counterpart of Aether.
  2. (Mormonism) The ancient American prophet of Mormon theology who wrote the Book of Ether in the Book of Mormon.
  • Russian: Эфир
  • Spanish: Éter

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