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
The study authors also found that the ratio of gaseous carbon dioxide to ice differs significantly from what is seen in star-forming regions, indicating that the processes controlling ice formation or alteration in planetary nebulae may be very different.
—Rupendra Brahambhatt, Interesting Engineering, 15 Mar. 2026
This produced gaseous ammonia, which is 82% nitrogen.
—Edward Lotterman, Twin Cities, 15 Mar. 2026
Even the final suite of empty office spaces where Lockjaw meets his quiet, gaseous demise feels like something out of the early scenes of The Shining, when Jack Torrance is being shown around the Overlook Hotel.
—Bilge Ebiri, Vulture, 13 Mar. 2026
When stars begin to run out of hydrogen, the fuel needed for nuclear fusion, the outward pressure of fusion decreases, causing the stars' gaseous outer layers to contract.
—Brett Tingley, Space.com, 10 Mar. 2026
See All Example Sentences for gaseous
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Rupendra Brahambhatt, Interesting Engineering, 15 Mar. 2026
This produced gaseous ammonia, which is 82% nitrogen.
—Edward Lotterman, Twin Cities, 15 Mar. 2026
Even the final suite of empty office spaces where Lockjaw meets his quiet, gaseous demise feels like something out of the early scenes of The Shining, when Jack Torrance is being shown around the Overlook Hotel.
—Bilge Ebiri, Vulture, 13 Mar. 2026
When stars begin to run out of hydrogen, the fuel needed for nuclear fusion, the outward pressure of fusion decreases, causing the stars' gaseous outer layers to contract.
—Brett Tingley, Space.com, 10 Mar. 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 17 Mar. 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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