Ether was often described as an invisible light or fire; Its name comes from the greek verb aithein, meaning to ignite or to blaze. when ethereal, the adjectival kin of ether, debuted in english in the … Definition of ethereal adjective in oxford advanced learner's dictionary.

Light, airy, or tenuous. See examples of ethereal used in a sentence. Very light and delicate, especially in a way that does not seem to come from the real, physical…. Learn more.