Definition of "gaseous" in English

adjective

1. Relating to, or existing as gas (matter in an intermediate state between liquid and plasma).

   • gaseous state
   • gaseous emissions
   • gaseous substance
   • At room temperature, oxygen remains in a gaseous state.
   • The mixture produced a gaseous vapor when heated.

2. Of a liquid containing bubbles: gassy.

3. Lacking substance or solidity; tenuous.

   • Her gaseous explanations left everyone confused.