blind alley

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• February 27. 2016 from wordnet.princeton.edu

  blind alley — noun — english

  a street with only one way in or out

• February 27. 2016 from wordnet.princeton.edu

  blind alley — noun — english

  (figurative) a course of action that is unproductive and offers no hope of improvement; "all the clues led the police into blind alleys"; "so far every road that we've been down has turned out to be a blind alley"