from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An alley or passage that is closed at one end.
  • n. A mistaken, unproductive undertaking.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Used other than as an idiom: see blind,‎ alley. A street or passageway that leads nowhere.
  • n. A course of inquiry that leads nowhere.

from the GNU version of the Collaborative International Dictionary of English

  • adj. an alley closed at one end; a cul-de-sac.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a street with only one way in or out
  • n. (figurative) a course of action that is unproductive and offers no hope of improvement


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