low-water mark

Definitions of low-water mark
  1. noun
    a line marking the lowest level reached
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    type of:
    water line, watermark
    a line marking the level reached by a body of water
  2. noun
    an extreme state of adversity; the lowest point of anything
    synonyms: nadir
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    type of:
    adversity, hard knocks, hardship
    a state of misfortune or affliction
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