ether

play
noun \ˈē-thər\

Definition of ether

  1. 1a :  the rarefied element formerly believed to fill the upper regions of spaceb :  the upper regions of space :  heavens

  2. 2a or less commonly aether \ˈē-thər\ :  a medium that in the wave theory of light permeates all space and transmits transverse wavesb :  airwaves

  3. 3a :  a light volatile flammable liquid C4H10O used chiefly as a solvent and especially formerly as an anestheticb :  any of a class of organic compounds characterized by an oxygen atom attached to two carbon atoms

etheric

play \i-ˈther-ik, -ˈthir-\ adjective

Examples of ether in a Sentence

  1. The balloon disappeared into the ether.

Recent Examples of ether from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ether'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of ether

Middle English, from Latin aether, from Greek aithēr, from aithein to ignite, blaze; akin to Old English ād pyre — more at edify

Other Chemical Engineering Terms



ETHER Defined for English Language Learners

ether

play
noun

Definition of ether for English Language Learners

  • : a liquid that burns easily, that is used to turn solid substances into liquid, and that was used in medicine in the past to prevent patients from feeling pain during operations

  • the ether : the air : the sky


ETHER Defined for Kids

ether

play
noun \ˈē-thər\

Definition of ether for Students

  1. :  a light flammable liquid used to dissolve fats and especially in the past as an anesthetic


Medical Dictionary

ether

play
noun \ˈē-thər\

Medical Definition of ether

  1. 1:  a medium that in the wave theory of light permeates all space and transmits transverse waves

  2. 2a:  a light volatile flammable liquid C4H10O used especially formerly chiefly as an anesthetic—called also diethyl ether, ethyl ether, ethyl oxideb:  any of various organic compounds characterized by an oxygen atom attached to two carbon atoms


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