GNU Collaborative International Dictionary of English

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Found 2 definitions

1.       
   Frost , n. [OE. frost, forst, AS. forst, frost. fr. freósan to freeze; akin to D. varst, G., OHG., Icel., Dan., & Sw. frost. √18. See Freeze, v. i.]
    The act of freezing; -- applied chiefly to the congelation of water; congelation of fluids.
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   The state or temperature of the air which occasions congelation, or the freezing of water; severe cold or freezing weather.
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   The third bay comes a frost, a killing frost.
   Shak.
   
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   Frozen dew; -- called also hoarfrost or white frost.
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   He scattereth the hoarfrost like ashes.
   Ps. cxlvii. 16.
   
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   Coldness or insensibility; severity or rigidity of character. [R.]
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   It was of those moments of intense feeling when the frost of the Scottish people melts like a snow wreath.
   Sir W. Scott.
   
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   Black frost, cold so intense as to freeze vegetation and cause it to turn black, without the formation of hoarfrost. -- Frost bearer (Physics), a philosophical instrument illustrating the freezing of water in a vacuum; a cryophorus. -- Frost grape (Bot.), an American grape, with very small, acid berries. -- Frost lamp, a lamp placed below the oil tube of an Argand lamp to keep the oil limpid on cold nights; -- used especially in lighthouses. Knight. -- Frost nail, a nail with a sharp head driven into a horse's shoe to keep him from slipping. -- Frost smoke, an appearance resembling smoke, caused by congelation of vapor in the atmosphere in time of severe cold.
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   The brig and the ice round her are covered by a strange black
   obscurity: it is the frost smoke of arctic winters.
   Kane.
   -- Frost valve, a valve to drain the portion of a pipe, hydrant, pump, etc., where water would be liable to freeze. -- Jack Frost, a popular personification of frost.
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2.       
   Hoarfrost , n. The white particles formed by the congelation of dew; white frost. [Written also horefrost. See Hoar, a.]
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   He scattereth the hoarfrost like ashes.
   Ps. cxlvii. 16.
   
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