Permafrost Definition

pûrmə-frôst, -frŏst
noun
Permanently frozen soil, subsoil, etc.
Webster's New World

Other Word Forms of Permafrost

Noun

Singular:
permafrost
Plural:
permafrosts

Origin of Permafrost

  • perma(nent) frost

    From American Heritage Dictionary of the English Language, 5th Edition

  • perma- +"Ž frost

    From Wiktionary

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permafrost