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
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
Melting permafrost can weaken peaks.
—Molly Hunter, NBC news, 19 Aug. 2025
Methane seeps are not new to science — they have been documented in shallower waters off California, New Zealand, and in the Gulf of Mexico, and methane is also released when Arctic permafrost thaws.
—Ingmar Rentzhog, Forbes.com, 14 Aug. 2025
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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
Melting permafrost can weaken peaks.
—Molly Hunter, NBC news, 19 Aug. 2025
Methane seeps are not new to science — they have been documented in shallower waters off California, New Zealand, and in the Gulf of Mexico, and methane is also released when Arctic permafrost thaws.
—Ingmar Rentzhog, Forbes.com, 14 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 9 Sep. 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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