the variable surface constituting the upper limit of permafrost.
Compare (def 2).


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    noun a permanent freelance worker Word Origin perma(nent) + (free)lancer Usage Note informal

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    [pur-muh-lingk] /ˈpɜr məˌlɪŋk/ noun, Digital Technology. 1. a permanent URL that links to a specific Web page, typically a single blog entry or news article. /ˈpɜːməˌlɪŋk/ noun 1. an internet hyperlink that is intended to be permanent

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    [purm-al-oi, pur-muh-loi] /ˌpɜrmˈæl ɔɪ, ˈpɜr məˌlɔɪ/ Trademark. 1. a brand name for any of a class of alloys of high magnetic permeability, containing from 30 to 90 percent nickel. /pɜːmˈælɔɪ/ noun 1. any of various alloys containing iron and nickel (45–80 per cent) and sometimes smaller amounts of chromium and molybdenum

  • Permanence

    [pur-muh-nuh ns] /ˈpɜr mə nəns/ noun 1. the condition or quality of being ; perpetual or continued existence. /ˈpɜːmənəns/ noun 1. the state or quality of being permanent n. early 15c., from Middle French permanence and directly from Medieval Latin permanentia (early 14c.), from Latin permanens (see permanent). Related: Permanency.

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