say it: GAS-ee-uhs
gaseous is an adjective meaning "existing as or having characteristics of a gas". It carries one recorded sense.
existing as or having characteristics of a gas
“steam is water is the gaseous state”
Definitions, synonyms and semantic relations for gaseous come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.