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
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
On-hand inventories of enriched uranium below five percent as well as natural uranium in the gaseous form would be limited to the amount required to meet near-term fueling needs.
—Robert J. Einhorn, Foreign Affairs, 29 Aug. 2025
Thermal gasification is a more involved process that heats organic waste to even higher temperatures, completely splitting molecules apart and creating just gaseous fuel and biochar.
—Erik Kobayashi-Solomon, Forbes.com, 28 Aug. 2025
At the very end of the star’s life, after all of the gaseous layers have formed, the iron core of the star forms, Miller explained.
—Ashley Strickland, CNN Money, 22 Aug. 2025
Now, the University of California, Riverside, study proposes that exoplanets, especially large, gaseous ones like Jupiter, could act as natural laboratories for dark matter search.
—Mrigakshi Dixit, Interesting Engineering, 22 Aug. 2025
See All Example Sentences for gaseous
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Robert J. Einhorn, Foreign Affairs, 29 Aug. 2025
Thermal gasification is a more involved process that heats organic waste to even higher temperatures, completely splitting molecules apart and creating just gaseous fuel and biochar.
—Erik Kobayashi-Solomon, Forbes.com, 28 Aug. 2025
At the very end of the star’s life, after all of the gaseous layers have formed, the iron core of the star forms, Miller explained.
—Ashley Strickland, CNN Money, 22 Aug. 2025
Now, the University of California, Riverside, study proposes that exoplanets, especially large, gaseous ones like Jupiter, could act as natural laboratories for dark matter search.
—Mrigakshi Dixit, Interesting Engineering, 22 Aug. 2025
See All Example Sentences for gaseous
Cite this Entry
“Gaseous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gaseous. Accessed 10 Sep. 2025.
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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