Definition of black frost in English:

black frost

noun

mass noun
  • Frost which does not have a white surface.

    • ‘For two weeks we had a black frost day and night with a strong east wind and then on February 2nd, when everywhere was bone dry at 3pm, the snow started to fall.’
    • ‘We had black frost in late winter last year with minimum of -5 degree C.’
    • ‘A black frost is when the dew point is less than the low temperature reached.’
    • ‘The black frost we experienced in late May came down from the north, which was very unusual, and it frosted many indigenous trees in the Bushveld.’
    ice crystals, ice, rime, rime ice, verglas
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