Firn meaning

fîrn
The granular snow, not in a completely compacted mass, that accumulates at the top of a glacier.
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Granular, partially consolidated snow that has passed through one summer melt season but is not yet glacial ice. Firn becomes glacial ice once it has become impermeable to liquid water.
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A type of old snow which has gone through multiple thaw and refreeze cycles and thus is made of numerous small icy grains, though it is not nearly as saturated with water as snow-cone slush is; can be hard or somewhat soft depending on recent and current weather conditions.
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Granular, partially consolidated snow that has passed through one summer melt season but is not yet glacial ice.
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Origin of firn

  • German from German dialectal of last year from Old High German firni old

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

  • Borrowing from German Firn, from Alemannic German firn (“last year's”), from Old High German firni (“old”), from Proto-Germanic *firnijaz, *fernaz (“foregoing, previous”), from Proto-Indo-European *per- (“forth, forward, across, through”); cognate with Old English fyrn (“former”), Old Norse forn (“old”), and Gothic (fairneis, “old”).

    From Wiktionary