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Definitions of dud
  1. noun
    an event that fails badly or is totally ineffectual
    "the meeting was a dud as far as new business was concerned"

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  2. noun
    an explosion that fails to occur

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  3. noun
    someone who is unsuccessful

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  4. adjective
    failing to detonate; especially not charged with an active explosive
    "he stepped on a dud mine"

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