permafrost

noun

per·​ma·​frost ˈpər-mə-ˌfrȯst How to pronounce permafrost (audio)
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The length of the thumb claw is about 1 centimeter. 35,000 to 37,000 years old The mummified cub, which would have been a carnivore, was found in the Upper Pleistocene permafrost on the Badyarikha River in Yakutia, Russia, the study states. Greta Cross, USA TODAY, 20 Nov. 2024 Like the kitten, both were also found in the Siberian permafrost. Charna Flam, People.com, 19 Nov. 2024 Wildfires have raged in the thawing permafrost of Siberia. Justin Guay, Foreign Affairs, 3 July 2020 This projection does not factor in tipping points, such as the collapse of the West Antarctic glacier and the thawing of methane-rich Arctic permafrost, that if reached would further destabilize the economy. John Kostyack, Forbes, 15 Oct. 2024 See all Example Sentences for permafrost 

Word History

Etymology

permanent + frost

First Known Use

1943, in the meaning defined above

Time Traveler
The first known use of permafrost was in 1943

Dictionary Entries Near permafrost

Cite this Entry

“Permafrost.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/permafrost. Accessed 17 Dec. 2024.

Kids Definition

permafrost

noun
per·​ma·​frost ˈpər-mə-ˌfrȯst How to pronounce permafrost (audio)
: a permanently frozen layer at variable depth below the surface in frigid regions of a planet (as earth)

More from Merriam-Webster on permafrost

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