Definition of sub-zero in English:

sub-zero

Line breaks: sub-zero

adjective

  • (Of temperature) lower than zero; below freezing: force 10 winds, torrential rain, and sub-zero temperatures
    More example sentences
    • It can feel relatively warm, even in sub-zero temperatures, if the sky is clear and the sun is shining, while a higher temperature can feel relatively cool if accompanied by a biting cold wind.
    • In very heavy seas, gales, blizzards and sub-zero temperatures and darkness six people including a girl aged 12 were rescued.
    • The battle was fought on a freezing cold Palm Sunday, with soldiers facing blizzards and sub-zero temperatures.

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noun
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