The Collaborative International Dictionary of English v.0.48:
Frost \Frost\ (fr[o^]st; 115), n. [OE. frost, forst, AS. forst,
frost. fr. fre['o]san to freeze; akin to D. varst, G., OHG.,
Icel., Dan., & Sw. frost. [root]18. See Freeze, v. i.]
1. The act of freezing; -- applied chiefly to the congelation
of water; congelation of fluids.
2. The state or temperature of the air which occasions
congelation, or the freezing of water; severe cold or
The third bay comes a frost, a killing frost.
3. Frozen dew; -- called also hoarfrost or white frost.
He scattereth the hoarfrost like ashes. --Ps.
4. Coldness or insensibility; severity or rigidity of
It was of those moments of intense feeling when the
frost of the Scottish people melts like a snow
wreath. --Sir W.
Black frost, cold so intense as to freeze vegetation and
cause it to turn black, without the formation of
Frost bearer (Physics), a philosophical instrument
illustrating the freezing of water in a vacuum; a
Frost grape (Bot.), an American grape, with very small,
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
The brig and the ice round her are covered by a
obscurity: it is the frost smoke of arctic winters.
Frost valve, a valve to drain the portion of a pipe,
hydrant, pump, etc., where water would be liable to
Jack Frost, a popular personification of frost.