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
For example, many of the spacecraft operators want gaseous nitrogen (GN2) on hand during launches.
—Richard Tribou, The Orlando Sentinel, 4 Apr. 2026
For example, compaction reduces pore space, which holds oxygen and a lack of oxygen in the soil can increase the rate in which some bacteria perform denitrification, a gaseous loss of nitrogen to the atmosphere.
—Nora Doonan, Hartford Courant, 4 Apr. 2026
The closeout crew will then pressurize the Crew Module side hatch with gaseous nitrogen so that it can be quickly opened in the event of an emergency exit.
—Miles Doran, CBS News, 1 Apr. 2026
The same is true for gaseous anhydrous ammonia fertilizer.
—Edward Lotterman, Twin Cities, 29 Mar. 2026
See All Example Sentences for gaseous
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Richard Tribou, The Orlando Sentinel, 4 Apr. 2026
For example, compaction reduces pore space, which holds oxygen and a lack of oxygen in the soil can increase the rate in which some bacteria perform denitrification, a gaseous loss of nitrogen to the atmosphere.
—Nora Doonan, Hartford Courant, 4 Apr. 2026
The closeout crew will then pressurize the Crew Module side hatch with gaseous nitrogen so that it can be quickly opened in the event of an emergency exit.
—Miles Doran, CBS News, 1 Apr. 2026
The same is true for gaseous anhydrous ammonia fertilizer.
—Edward Lotterman, Twin Cities, 29 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 8 Apr. 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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