Definition of frost noun from the Oxford Advanced American Dictionary

     

    frost

     noun
    noun
    NAmE//frɔst//
     
     
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  1. 1 [uncountable, countable] a weather condition in which the temperature drops below 32°F or 0°C (= freezing point ) so that a thin white layer of ice forms on the ground and other surfaces, especially at night It will be a clear night with some ground frost. a light/heavy/hard frost frost damage
  2. 2 [uncountable] the thin white layer of ice that forms when the temperature drops below 32°F or 0°C The car windows were covered with frost. see also hoarfrost
See the Oxford Advanced Learner's Dictionary entry: frost