outgas

verb

out·​gas ˈau̇t-ˌgas How to pronounce outgas (audio)
ˌau̇t-ˈgas
outgassed; outgassing; outgasses

transitive verb

1
: to remove occluded gases from usually by heating
broadly : to remove gases from
2
: to remove (gases) from a material or a space

intransitive verb

: to lose gases

Examples of outgas in a Sentence

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 activity likely took the form of outgassing jets—as the comet approached the sun, the star’s heat would have caused frozen ices to become gas. — Claire Cameron, Scientific American, 27 Mar. 2026 And why don’t all outgassing objects that emit carbon dioxide also show signatures of water? — Ethan Siegel, Big Think, 26 Aug. 2025 The only other possibility is that the vinyl from the car’s dashboard and interior parts is outgassing. — Ray Magliozzi, The Seattle Times, 29 Aug. 2017 The extra heating from the sun had warmed the comet’s surface, increasing the amount of outgassing from the comet, but the level of outgassing was beginning to decrease as the comet moved away. — Keith Cooper, Space.com, 5 June 2026 See All Example Sentences for outgas

Word History

First Known Use

1919, in the meaning defined at transitive sense 1

Time Traveler
The first known use of outgas was in 1919

Browse Nearby Words

outgarth
outgas
outgate
See all Nearby Words

Cite this Entry

“Outgas.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/outgas. Accessed 7 Jul. 2026.

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