permafrost
noun
per·ma·frost
ˈpər-mə-ˌfrȯst 
: a permanently frozen layer at variable depth below the surface in frigid regions of a planet (such as earth)
Examples of permafrost in a Sentence
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Greenhouse gases stored in subsea permafrost reservoirs in ice-free regions of the Antarctic are similarly vulnerable to climate change.
—
Julia Jacobo, ABC News, 11 Oct. 2025
Decked out in Tyvek suits and N95 respirators, the researchers collected meter-long cores from the permafrost layer, according to the study.
—Irene Wright, Miami Herald, 7 Oct. 2025
These findings significantly advance the modeling seen in 2024 research that pointed to thawing permafrost, salty cryopeg layers and methane hydrates as possible triggers.
—New Atlas, 21 Sep. 2025
Warm conditions produce more food for these microbes, which thrive in rotting vegetation, as is found in tropical wetlands and thawing Arctic permafrost.
—Katherine Bourzac, Quanta Magazine, 15 Sep. 2025
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Julia Jacobo, ABC News, 11 Oct. 2025
Decked out in Tyvek suits and N95 respirators, the researchers collected meter-long cores from the permafrost layer, according to the study.
—Irene Wright, Miami Herald, 7 Oct. 2025
These findings significantly advance the modeling seen in 2024 research that pointed to thawing permafrost, salty cryopeg layers and methane hydrates as possible triggers.
—New Atlas, 21 Sep. 2025
Warm conditions produce more food for these microbes, which thrive in rotting vegetation, as is found in tropical wetlands and thawing Arctic permafrost.
—Katherine Bourzac, Quanta Magazine, 15 Sep. 2025
See All Example Sentences for permafrost
Cite this Entry
“Permafrost.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/permafrost. Accessed 18 Oct. 2025.
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permafrost
noun
per·ma·frost
ˈpər-mə-ˌfrȯst
: a permanently frozen layer at variable depth below the surface in frigid regions of a planet (as earth)
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