plural off-gases also off-gasses
: a gas that is produced as a by-product of an industrial process or that is given off by a manufactured object or material
Refinery off-gases from fluid catalytic cracking could be a source of ethylene.—
Predicasts Technology Update
Predicasts Technology Update
off-gassed; off-gassing
: to give off a typically harmful gas
In addition, OSHA intends to amend the hazard communication provisions of the standard to require hazard warning labels for solid materials capable of off-gassing formaldehyde at levels between 0.1 ppm and 0.5 ppm …—Chemical & Engineering News
Chemical & Engineering News… there have been environmental concerns about the phenol formaldehyde binders used in most engineered-wood products, which can off-gas.—Max Alexander
Max AlexanderExamples of off-gas in a Sentence
Recent Examples on the Web
Simon Hill, Wired News, 11 July 2025
Especially one that’s not going to off-gas chemicals and that’s as natural as possible.
—Ingrid Schmidt, HollywoodReporter, 10 Apr. 2025
Reducing or replacing items in that off-gas is also important.
—Elycia Rubin, The Hollywood Reporter, 7 Feb. 2025
These surfaces can off-gas for weeks or even months, studies show, although that will reduce over time.
—Jen Christensen, CNN, 13 Jan. 2025
New furniture right out of the box has been shown to off-gas more than pieces that have been sitting out of their packaging for a while.
—Topher Sanders, ProPublica, 9 Dec. 2024
Carpets that contain those PFAS, either in the fibers themselves or in the treatments, can off-gas those PFAS as volatile organic compounds, or VOCs.
—Lisa Wood Shapiro, WIRED, 7 Dec. 2024
Indoor plastics, furniture, paint, and flooring off-gas noxious fumes too.
—Lisa Wood Shapiro, WIRED, 28 Nov. 2024
Boxed mattresses also usually need at least a few days to expand and fully air out (or off-gas) so hold off on dumping your old one.
—Kells McPhillips, SELF, 1 Aug. 2024
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Noun
Just be sure to let it off-gas in a ventilated area for a few days.
—Simon Hill, Wired News, 11 July 2025
Especially one that’s not going to off-gas chemicals and that’s as natural as possible.
—Ingrid Schmidt, HollywoodReporter, 10 Apr. 2025
Reducing or replacing items in that off-gas is also important.
—Elycia Rubin, The Hollywood Reporter, 7 Feb. 2025
These surfaces can off-gas for weeks or even months, studies show, although that will reduce over time.
—Jen Christensen, CNN, 13 Jan. 2025
New furniture right out of the box has been shown to off-gas more than pieces that have been sitting out of their packaging for a while.
—Topher Sanders, ProPublica, 9 Dec. 2024
Carpets that contain those PFAS, either in the fibers themselves or in the treatments, can off-gas those PFAS as volatile organic compounds, or VOCs.
—Lisa Wood Shapiro, WIRED, 7 Dec. 2024
Indoor plastics, furniture, paint, and flooring off-gas noxious fumes too.
—Lisa Wood Shapiro, WIRED, 28 Nov. 2024
Boxed mattresses also usually need at least a few days to expand and fully air out (or off-gas) so hold off on dumping your old one.
—Kells McPhillips, SELF, 1 Aug. 2024
Cite this Entry
“Off-gas.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/off-gas. Accessed 27 Jul. 2025.
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