Definition of "blind alley" []

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The minute he saw her disappear into a kind of blind alley at the end of the street, he guessed at once that it was Madame Retailleau."
• "It lay at right angles to the blind alley which was Beverley Mews on the one side, and Wishart Street, which wriggled down into Church Street, Kensington, on the other."