ETHER

noun see: edify Date: 14th century 1. the rarefied element formerly believed to fill the upper regions of space, the upper regions of space ; heavens, 2. a medium that in the wave theory of light permeates all space and transmits transverse waves, airwaves , 3. a light volatile flammable liquid C 4 H 10 O used chiefly as a solvent and especially formerly as an anesthetic, any of a class of organic compounds characterized by an oxygen atom attached to two carbon atoms, ~ic adjective