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
In the conversion phase, KRICT uses the Fischer–Tropsch process to transform gaseous syngas into liquid aviation fuel.
—Mrigakshi Dixit, Interesting Engineering, 5 Feb. 2026
These winds of gaseous metals, including iron and calcium, were mapped in three-dimensions, marking the first time astronomers have measured the internal gas motions of a disk orbiting a secondary object such as a planet or low-mass star.
—Robert Lea, Space.com, 23 Jan. 2026
In addition, teams had to fix leaky ground support hardware used to load gaseous oxygen into Orion for its crew to breathe.
—Richard Tribou, The Orlando Sentinel, 10 Jan. 2026
The energy department also awarded $28 million to Global Laser Enrichment, which recently obtained hundreds of acres near the gaseous diffusion site and is planning to establish its own enrichment operation.
—Connor Giffin, Louisville Courier Journal, 10 Jan. 2026
See All Example Sentences for gaseous
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Mrigakshi Dixit, Interesting Engineering, 5 Feb. 2026
These winds of gaseous metals, including iron and calcium, were mapped in three-dimensions, marking the first time astronomers have measured the internal gas motions of a disk orbiting a secondary object such as a planet or low-mass star.
—Robert Lea, Space.com, 23 Jan. 2026
In addition, teams had to fix leaky ground support hardware used to load gaseous oxygen into Orion for its crew to breathe.
—Richard Tribou, The Orlando Sentinel, 10 Jan. 2026
The energy department also awarded $28 million to Global Laser Enrichment, which recently obtained hundreds of acres near the gaseous diffusion site and is planning to establish its own enrichment operation.
—Connor Giffin, Louisville Courier Journal, 10 Jan. 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 15 Feb. 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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