Consisting or composed of air or gas; aeriform, gaseous; (in early use) associated with or having the nature of air, considered as one of the four…

Full of gas; (excessively) effervescent. Also: of the nature of or characteristic of gas. Cf. gaseous, adj. 2.

Of the form or nature of a gas; gaseous. Now chiefly historical.

Of the nature or form of a gas; composed of gas.

= aeriform, adj. 1.

Of the nature of gas, gaseous.

In the form of a gas; gaseous. Also figurative.