gaseous

adjective

gas·​eous ˈga-sē-əs How to pronounce gaseous (audio) ˈga-shəs How to pronounce gaseous (audio)
Synonyms of gaseousnext
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
gaseousness noun

Synonyms of gaseous

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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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This is thought to be because intense stellar radiation strips planets of their gaseous layers effectively shrinking them. — Robert Lea, Space.com, 26 Aug. 2026 Scientists have observed this instability pattern in lake and ocean waves, cloud formation and the atmospheres of large gaseous planets such as Jupiter and Saturn. — Ashley Strickland, CNN Money, 5 Aug. 2026 One leading theory suggests that a large fraction of their total mass consists of gaseous envelopes composed of hydrogen and helium. — Chris Young july 30, Refractor, 30 July 2026 The problem with all those experiments was that the small, densely gaseous chambers used in the lab are nothing like your home. — Leanne Potts, Better Homes & Gardens, 30 July 2026 See All Example Sentences for gaseous

Word History

First Known Use

1799, in the meaning defined at sense 1

Time Traveler
The first known use of gaseous was in 1799

Rhymes for gaseous

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Browse Nearby Words

gas engine
gaseous
gaseous diffusion
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Cite this Entry

“Gaseous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gaseous. Accessed 1 Sep. 2026.

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Kids Definition

gaseous

adjective
gas·​eous ˈgas-ē-əs How to pronounce gaseous (audio)
ˈgash-əs
1
: having the form of or being gas
2
: of or relating to gas
3
: lacking solidity

Medical Definition

gaseous

adjective
gas·​eous ˈgas-ē-əs How to pronounce gaseous (audio) ˈgash-əs How to pronounce gaseous (audio)
: having the form of or being gas
also : of or relating to gases
Last Updated: - Updated example sentences
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