Synonyms: aerial, aeriform, aery, airy, ethereal
Definition: characterized by lightness and insubstantiality; as impalpable or intangible as air
Usage: figures light and aeriform come unlooked for and melt away- Thomas Carlyle; aerial fancies; an airy apparition; physical rather than ethereal forms
Similar words: insubstantial, unreal, unsubstantial
Definition: lacking material form or substance; unreal
Usage: as insubstantial as a dream; an insubstantial mirage on the horizon
Definition: resembling air or having the form of air
Similar words: gaseous
Definition: existing as or having characteristics of a gas
Usage: steam is water is the gaseous state