black frost
noun
intense cold without hoarfrost, causing vegetation to turn black.
Compare frost(def 2).
Origin of black frost
First recorded in 1700–10
Words nearby black frost
black forest,
black forest cake,
black fox,
black friar,
black friday,
black frost,
black game,
black gang,
black gnat,
black gold,
black grouse
British Dictionary definitions for black frost
black frost
noun
a frost without snow or rime that is severe enough to blacken vegetation