outgas

American  

[out-gas, out-gas] / ˈaʊtˌgæs, ˌaʊtˈgæs /

verb (used with object)

outgassed, outgassing

1. to remove (adsorbed or occluded gases), usually by heat or reduced pressure.

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verb (used without object)

outgassed, outgassing

1. to lose gas.

outgas British  

/ ˌaʊtˈɡæs /

verb

1. to undergo or cause to undergo the removal of adsorbed or absorbed gas from solids, often by heating in free space

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Etymology

Origin of outgas

First recorded in 1920–25; out- + gas

Example Sentences

See Examples For:

outgas outgassed outgassing

“They’re like rockets, right? They outgas, and when they spit something out, Newton’s law says you go the other way.”

From Scientific American ● Mar. 22, 2023

It didn’t help that silicone sealant used on the capsule outgassed, creating a greasy, foggy oil that coated some of the spacecraft windows.

From Salon ● Dec. 21, 2018

Prior to measurements, the samples were outgassed and heated at 573 K for 16 h under vacuum.

From Nature ● Mar. 14, 2017

That source, however, could also be the rover itself, which has components known to have outgassed small amounts of methane in the past.

From Washington Post ● Dec. 17, 2014

It is even possible that the material outgassed from Io contributes, after many collisions and condensations, to the ring system of Jupiter.

From "Cosmos" by Carl Sagan

Ultimately the methods invented by British chemists and physicists outgassed the Germans.

From The New Gresham Encyclopedia Volume 4, Part 3: Estremoz to Felspar by Various

"Nothing's happening, then: outgassing and boom-boom-boom – all these explosions."

From BBC ● Jan. 15, 2026

Investigations in the Apennines: CO2 outgassing or storage -- which process dominates?

From Science Daily ● Apr. 19, 2024

"There are still many unknowns regarding volcanism and how long a planet can maintain outgassing processes," Kane said, referring to the release of trapped gas that occurs with eruptions.

From Reuters ● May 17, 2023

In the same paper, Loeb theorized the acceleration could have been a result of cometary outgassing, but said it was unlikely because there was no evidence for a cometary tail around it.

From Salon ● Mar. 26, 2023

“We have never, ever seen ice outgassing without dust. Never,” Luu says.

From Scientific American ● Mar. 22, 2023