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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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
The library functions as a growing catalog of extremophile organisms found in permafrost — a biological reference collection that didn’t exist until this research began building it.
—Ryan Brennan, Kansas City Star, 13 Feb. 2026
See All Example Sentences for permafrost
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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
The library functions as a growing catalog of extremophile organisms found in permafrost — a biological reference collection that didn’t exist until this research began building it.
—Ryan Brennan, Kansas City Star, 13 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 9 Mar. 2026.
Copy CitationKids Definition
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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