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Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Physical Geography) ground that is permanently frozen, often to great depths, the surface sometimes thawing in the summer
[C20: from perma(nent) + frost]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
per•ma•frost(ˈpɜr məˌfrɔst, -ˌfrɒst)
(in arctic or subarctic regions) permanently frozen subsoil.
[1943; perma (nent) frost]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A layer of permanently frozen subsoil, reaching depths up to 5,000 feet (1,524 meters). Permafrost is found throughout most of the polar regions.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Permanently frozen subsoil.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
Permanently frozen ground found in polar and subpolar zones.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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|Noun||1.||permafrost - ground that is permanently frozen|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
permafrost[ˈpɜːməfrɒst] N → permagel m
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
n → Dauerfrostboden m
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
permafrost[ˈpɜːməˌfrɒst] n → permafrost m inv
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995