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
Stars can be seen shining above the outline of our planet's dense, gaseous atmosphere as the sun sets, while city lights and lightning storms play across the cloudy vista below.
—Anthony Wood, Space.com, 12 June 2025
Take a small telescope and check out Jupiter’s four brightest moons that flank the great gaseous planet and circle around it in periods of two to 17 days.
—Mike Lynch, Twin Cities, 30 Mar. 2025
The images show ultra-fine bright and dark stripes (called striations) in the thin, gaseous layer of the sun's atmosphere known as the photosphere, according to a statement from the National Solar Observatory (NSO), which operates the solar telescope.
—Samantha Mathewson, Space.com, 6 June 2025
This clean-sheet architecture optimizes the use of gaseous hydrogen, addressing the challenges of incorporating this fuel into existing aircraft designs.
—Kurt Knutsson, Cyberguy Report, FOXNews.com, 7 Apr. 2025
See All Example Sentences for gaseous
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Anthony Wood, Space.com, 12 June 2025
Take a small telescope and check out Jupiter’s four brightest moons that flank the great gaseous planet and circle around it in periods of two to 17 days.
—Mike Lynch, Twin Cities, 30 Mar. 2025
The images show ultra-fine bright and dark stripes (called striations) in the thin, gaseous layer of the sun's atmosphere known as the photosphere, according to a statement from the National Solar Observatory (NSO), which operates the solar telescope.
—Samantha Mathewson, Space.com, 6 June 2025
This clean-sheet architecture optimizes the use of gaseous hydrogen, addressing the challenges of incorporating this fuel into existing aircraft designs.
—Kurt Knutsson, Cyberguy Report, FOXNews.com, 7 Apr. 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 30 Jun. 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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