gas·eous | \ˈga-sē-əs, ˈga-shəs\

Definition of gaseous 

1 : having the form of or being gas also : of or relating to gases

2a : lacking substance or solidity

b : gassy sense 3 trick phrases and gaseous circumlocutions— Edwin Newman

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Other Words from gaseous

gaseousness noun

Synonyms & Antonyms for gaseous


bombastic, fustian, grandiloquent, oratorical, rhetorical (also rhetoric), windy



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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

Researchers believe that about half of the carbon remains in its pure form while the rest of it binds with hydrogen, creating either greasy aliphatic carbon or gaseous naphthalene, the stuff used in mothballs. Jason Daley, Smithsonian, "Our Galaxy Is Really Greasy and Smells Like Moth Balls," 28 June 2018 The oily gaseous mixture then deposits on the intake valves via the positive crankcase ventilation, or PCV, system. Bob Weber,, "Drivers can ship your car cross country," 8 July 2018 His team concluded that the unexpected motion of Oumuamua had to be caused by the spewing out of small quantities of gaseous materials from its surface. David Freeman /, NBC News, "Mysterious 'Oumuamua' space object has finally been identified," 1 July 2018 The gaseous Jupiter reached opposition May 8, and Mars gets to opposition July 27. Blaine P. Friedlander Jr., Washington Post, "Skywatch: Saturn, Jupiter and Mars heading for opposition in June and July," 2 June 2018 This new tactic, hunting for eddies in the gaseous chaos of protoplanetary disks, could prove to be as significant to exoplanet studies as the methods that came before. Jay Bennett, Popular Mechanics, "Three Newborn Planets Discovered Around an Infant Star," 13 June 2018 One of the earliest and most primitive enrichment techniques used in this endeavor was gaseous diffusion. Umair Irfan, Vox, "Uranium enrichment will be a key point in talks with North Korea. Here’s what it is.," 11 June 2018 The broader threat is gaseous vog and ash — vog is the volcanic form of fog. New York Times, "Hawaii Rep. Tulsi Gabbard Wants Tourists to Stay Away from Volcano," 5 June 2018 As the night grows darker, the large gaseous planet becomes an exceptionally bright spot. Blaine Friedlander, Washington Post, "Jupiter reaches opposition early next week. Here’s how to see it.," 4 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'gaseous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of gaseous

1799, in the meaning defined at sense 1

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Statistics for gaseous

Last Updated

21 Aug 2018

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Time Traveler for gaseous

The first known use of gaseous was in 1799

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English Language Learners Definition of gaseous

: having the form of gas


gas·eous | \ˈga-sē-əs, ˈga-shəs\

Kids Definition of gaseous

1 : having the form of gas The substance changed from a liquid to a gaseous state.

2 : of or relating to gas gaseous odors


gas·eous | \ˈgas-ē-əs, ˈgash-əs \

Medical Definition of gaseous 

: having the form of or being gas also : of or relating to gases

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More from Merriam-Webster on gaseous

Thesaurus: All synonyms and antonyms for gaseous

Spanish Central: Translation of gaseous

Nglish: Translation of gaseous for Spanish Speakers

Britannica English: Translation of gaseous for Arabic Speakers

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