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| dead end (plural dead ends) |
noun |
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| Definition: |
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1. point at which something ends abruptly: an end of a street, path, road, or passage beyond which it is impossible to proceed
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2. passage that ends abruptly: a street, path, or passage beyond which somebody or something cannot proceed
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3. situation that leads nowhere: a situation or course of action in which further progress or development is impossible
  a line of research that proved to be a dead end
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