a killing 'frost' [=weather that is so cold that the frost kills plants]
These plants should bloom until the first 'frost' of the season.
I have to 'frost' the birthday cake.
(..) the mountain's crumbling bones. The Rockies are no longer rising but slowly disintegrating. All mountains everywhere are being worn down by frost, snow and ice. The Alps were raised some million years ago as Africa, drifting northwards, collided with the southern edge of Europe. (..)2006 TvShow: Planet Earth Title: Mountains Season: 1 Episode 2