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night key

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noun
  1. a key for a night latch.
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Origin of night key

An Americanism dating back to 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for night key

Historical Examples

  • It was two o'clock when Theodore applied his own night-key and entered his front door.

    Three People

    Pansy

  • All my lodgers were in but one, a young gentleman who has a night-key.

    The Mystery of the Hasty Arrow

    Anna Katharine Green

  • Like the other male occupants of the house, the lieutenant was provided with a night-key.

    Stand By The Union

    Oliver Optic

  • Hal soon walked the distance, and, getting out his night-key, he let himself in.

    The Missing Tin Box

    Arthur M. Winfield

  • I'd give him a 'night-key,' and be perfectly oblivious what time in the small hours he tumbled into the front entry.