1
: having the form of or being gas
also
: of or relating to gases
2
a
: lacking substance or solidity
b
: gassy sense 3
… trick phrases and gaseous circumlocutions …—
Edwin Newman
Edwin Newman
gaseousness
noun
Synonyms of gaseous
Examples of gaseous in a Sentence
a substance changing from a liquid to a gaseous state
a pompous professor known for his gaseous lectures that often put students to sleep
Recent Examples on the Web
Liquid and gaseous wastes are primarily regulated under pollution-control laws.
—Aman Kumar, Encyclopedia Britannica, 14 May 2026
In some high pressure areas, the gaseous atmosphere becomes fluid — but the results of this study suggest these atmospheres could also be littered with rocks.
—Chelsea Gohd, Space.com, 12 May 2026
The current version runs on compressed gaseous hydrogen, which is limited by tank volume and energy density.
—Omar Kardoudi
may 11, New Atlas, 11 May 2026
The process typically starts with the conversion of uranium oxide into stable gaseous uranium hexafluoride, or UF6, followed by a centrifuge technique that separates the three isotopes by mass.
—Stephanie Pappas, Scientific American, 23 Apr. 2026
See All Example Sentences for gaseous
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Aman Kumar, Encyclopedia Britannica, 14 May 2026
In some high pressure areas, the gaseous atmosphere becomes fluid — but the results of this study suggest these atmospheres could also be littered with rocks.
—Chelsea Gohd, Space.com, 12 May 2026
The current version runs on compressed gaseous hydrogen, which is limited by tank volume and energy density.
—Omar Kardoudi
may 11, New Atlas, 11 May 2026
The process typically starts with the conversion of uranium oxide into stable gaseous uranium hexafluoride, or UF6, followed by a centrifuge technique that separates the three isotopes by mass.
—Stephanie Pappas, Scientific American, 23 Apr. 2026
See All Example Sentences for gaseous
Cite this Entry
“Gaseous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gaseous. Accessed 19 May. 2026.
Copy CitationKids Definition
gaseous
adjective
gas·eous
ˈgas-ē-əs 
ˈgash-əs
1
: having the form of or being gas
2
: of or relating to gas
3
: lacking solidity
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