English dictionary

ether meaning and definition

ETHER noun

Definition of ether (noun)

  1. the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies
  2. any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom
  3. a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves
  4. a colorless volatile highly inflammable liquid formerly used as an inhalation anesthetic
Source: Princeton University Wordnet