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
Recent Examples on the Web
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
Changing the temperature changes lots about the Earth, from the reflectivity of sea ice to the stability of permafrost.
—Joseph Howlett, Quanta Magazine, 15 Sep. 2025
Passing through earthquake zones, the line peaks at 5,072m above sea level at the Tanggula pass and contains more than 300 miles of elevated track built on permafrost that could melt at the slightest increase in temperature.
—The Editors, Outside, 31 Aug. 2025
As the planet heats up, fresh water is seeping into the Arctic Ocean as the sea ice and the permafrost melts, while warmer waters from the Atlantic bleed in from the south.
—Ellie Cook, MSNBC Newsweek, 20 Aug. 2025
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New Atlas, 21 Sep. 2025
Changing the temperature changes lots about the Earth, from the reflectivity of sea ice to the stability of permafrost.
—Joseph Howlett, Quanta Magazine, 15 Sep. 2025
Passing through earthquake zones, the line peaks at 5,072m above sea level at the Tanggula pass and contains more than 300 miles of elevated track built on permafrost that could melt at the slightest increase in temperature.
—The Editors, Outside, 31 Aug. 2025
As the planet heats up, fresh water is seeping into the Arctic Ocean as the sea ice and the permafrost melts, while warmer waters from the Atlantic bleed in from the south.
—Ellie Cook, MSNBC Newsweek, 20 Aug. 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 7 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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