Definition of ether noun from the Oxford Advanced American Dictionary

     

    ether

     noun
    noun
    NAmE//ˈiθər//
     
    [uncountable]
     
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  1. 1a clear liquid made from alcohol, used in industry as a solvent and, in the past, in medicine to make people unconscious before an operation
  2. 2the ether (old use or literary) the upper part of the sky Her words disappeared into the ether.
  3. 3the ether the air, when it is thought of as the place in which radio or electronic communication takes place
See the Oxford Advanced Learner's Dictionary entry: ether