frost UK /fɹɒst/US /fɹɔst/noun 7verb 6forms 3phrases 1 noun7 •white ice in very small pieces that gathers on cold surfaces when the air freezes •The cold weather that causes these ice crystals to form.Thus I was; in the day the drought consumed me, and the frost by night; and my sleep departed from mine eyes. — 1611 •(figurative) Coldness or insensibility; severity or rigidity of character.It was one of those moments of intense feeling when the frost of the Scottish people melts like a snow-wreath. — 1815 •A shade of white, like that of frost. •A kind of light diffuser. •(slang, old-fashioned) A disappointment; a cheat. •(no longer used) The act of freezing; the congelation of water or other liquid. verb6 •To cover with frost. •To become covered with frost.“The weather is pleasant while it frosted a little at night.” — 1975 •To coat (something, e.g. a cake) with icing to resemble frost. •To bleach individual strands of hair while leaving adjacent strands untouched. •(informal) To anger or annoy.I think the boss's decision frosted him a bit. •To sharpen (the points of a horse's shoe) to prevent it from slipping on ice. formsfrosted · frosting · frosts Phrases with frost frost upto become frosty