Main Entry: gas·eous

Pronunciation: \ˈga-sē-əs, ˈga-shəs\

Function: adjective

Date: 1799

1 : having the form of or being gas; also : of or relating to gases
2 a : lacking substance or solidity b : gassy 3 <trick phrases and gaseous circumlocutions — Edwin Newman>

— gas·eous·ness noun