outgas
verb
out·gas
ˈau̇t-ˌgas 
ˌau̇t-ˈgas
outgassed; outgassing; outgasses
1
: to remove occluded gases from usually by heating
broadly
: to remove gases from
2
: to remove (gases) from a material or a space
: to lose gases
Examples of outgas in a Sentence
Recent Examples on the Web
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
Jewitt thinks that outgassing from the surface of the comet, which heated up during its perihelion passage that brings it about as close to the sun as Earth, is the cause.
—Keith Cooper, Space.com, 26 Mar. 2026
Like most comets, 3I/ATLAS does experience slight non-gravitational forces caused by outgassing — when sunlight heats the comet’s surface, jets of gas and dust can push it gently.
—Hannah Parry, MSNBC Newsweek, 29 Oct. 2025
Even if a harvester can outgas regolith reliably, separating minute traces of helium-3 from helium-4 and other gases at low mass fractions requires sophisticated cryogenic or membrane systems.
—Kaif Shaikh, Interesting Engineering, 24 Sep. 2025
And why don’t all outgassing objects that emit carbon dioxide also show signatures of water?
—Ethan Siegel, Big Think, 26 Aug. 2025
Natural carbon dioxide comes from outgassing from the ocean, decomposing plants, wildfires and volcanoes.
—Elizabeth Weise, USA TODAY, 14 Apr. 2023
Many have been discussed, and many are plausible, including changes in CO2 outgassing from the ocean due to changes in sea ice, changes in iron input to the ocean that influence CO2 uptake by phytoplankton, and large-scale ocean circulation changes that cause release of CO2 to the atmosphere.
—IEEE Spectrum, 14 Mar. 2023
Loeb concluded that outgassing could not have caused 'Oumuamua's acceleration.
—Rob Reid, Ars Technica, 29 Nov. 2018
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Claire Cameron, Scientific American, 27 Mar. 2026
Jewitt thinks that outgassing from the surface of the comet, which heated up during its perihelion passage that brings it about as close to the sun as Earth, is the cause.
—Keith Cooper, Space.com, 26 Mar. 2026
Like most comets, 3I/ATLAS does experience slight non-gravitational forces caused by outgassing — when sunlight heats the comet’s surface, jets of gas and dust can push it gently.
—Hannah Parry, MSNBC Newsweek, 29 Oct. 2025
Even if a harvester can outgas regolith reliably, separating minute traces of helium-3 from helium-4 and other gases at low mass fractions requires sophisticated cryogenic or membrane systems.
—Kaif Shaikh, Interesting Engineering, 24 Sep. 2025
And why don’t all outgassing objects that emit carbon dioxide also show signatures of water?
—Ethan Siegel, Big Think, 26 Aug. 2025
Natural carbon dioxide comes from outgassing from the ocean, decomposing plants, wildfires and volcanoes.
—Elizabeth Weise, USA TODAY, 14 Apr. 2023
Many have been discussed, and many are plausible, including changes in CO2 outgassing from the ocean due to changes in sea ice, changes in iron input to the ocean that influence CO2 uptake by phytoplankton, and large-scale ocean circulation changes that cause release of CO2 to the atmosphere.
—IEEE Spectrum, 14 Mar. 2023
Loeb concluded that outgassing could not have caused 'Oumuamua's acceleration.
—Rob Reid, Ars Technica, 29 Nov. 2018
Cite this Entry
“Outgas.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/outgas. Accessed 2 Apr. 2026.
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