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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Something that has been challenging for people and beavers is that as the Arctic is thawing, the permafrost is becoming no more.
—
Brianne Kane, Scientific American, 13 Mar. 2026
As a result, the atmosphere and oceans heat up, increasing the risks of passing tipping points – glaciers disappear, Atlantic Ocean circulation shuts down, permafrost thaws, coral reefs die.
—Michael Wysession, Fortune, 6 Mar. 2026
As a result, the atmosphere and oceans heat up, increasing the risks of passing tipping points – glaciers disappear, Atlantic Ocean circulation shuts down, permafrost thaws, coral reefs die.
—Michael Wysession, The Conversation, 5 Mar. 2026
Other researchers have revived 48,000-year-old viruses frozen in permafrost to examine the low but underappreciated risk of a disease outbreak unleashed by a long-dormant pathogen.
—Katie Hunt, CNN Money, 20 Feb. 2026
See All Example Sentences for permafrost
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Brianne Kane, Scientific American, 13 Mar. 2026
As a result, the atmosphere and oceans heat up, increasing the risks of passing tipping points – glaciers disappear, Atlantic Ocean circulation shuts down, permafrost thaws, coral reefs die.
—Michael Wysession, Fortune, 6 Mar. 2026
As a result, the atmosphere and oceans heat up, increasing the risks of passing tipping points – glaciers disappear, Atlantic Ocean circulation shuts down, permafrost thaws, coral reefs die.
—Michael Wysession, The Conversation, 5 Mar. 2026
Other researchers have revived 48,000-year-old viruses frozen in permafrost to examine the low but underappreciated risk of a disease outbreak unleashed by a long-dormant pathogen.
—Katie Hunt, CNN Money, 20 Feb. 2026
See All Example Sentences for permafrost
Cite this Entry
“Permafrost.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/permafrost. Accessed 20 Mar. 2026.
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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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