Definition of "night-latch" [night-latch]

• A form of door-lock with a spring-latch which may be opened by a knob or handle from the inside, but only by a key from the outside. (noun)

The Century Dictionary (Public Domain)

• "The upper part is separated from the lower by a massive door which opens from the hall and gives access to the staircase and which is fitted with a Chubb night-latch."
• "The door closed softly behind the retreating figure of the attorney-general, and Kent released the spring of the night-latch."
• ""Please don't think me ungrateful," she said, when she had thrown the night-latch for him."