1. (a.) In the form or nature of a gas; light; unsubstantial\.

2. (a.) Lacking substance or solidity; tenuous.

adulterated aerial aerodynamic aerostatic aery air-built airy attenuate attenuated chimerical cloud-built cut dilute diluted dreamlike ethereal fanciful fatuitous fatuous fine flimsy fuming fumy gasified gasiform gaslike gassy gossamery illusory imaginary insubstantial mephitic miasmal miasmatic miasmic oxyacetylene oxygenous ozonic phantomlike pneumatic rare rarefied reeking reeky shadowy slight smoking smoky spirituous steaming steamy subtile subtle tenuous thin thinned thinned-out uncompact uncompressed unreal unsubstantial vaporing vaporish vaporlike vaporous vapory watered watered-down windy