silent alarm

  1. an alarm that alerts security personnel or the police without the knowledge of the intruder or criminal whose presence triggers it: The silent alarm set off a flashing light at the police station.

  2. any visual rather than audible alarm.

Words Nearby silent alarm Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use silent alarm in a sentence

  • And then, some silent alarm clicked into place in Sabo's mind, tightening his stomach, screaming to be heard.

    Derelict | Alan Edward Nourse
  • “The silent alarm,” she murmured as she hastily drew from her pocket two dark cylinders.

    The Silent Alarm | Roy J. Snell
  • By the aid of the silent alarm she had received a message from her.

    The Silent Alarm | Roy J. Snell
  • Until now the silent alarm had been little more than a plaything.

    The Silent Alarm | Roy J. Snell
  • Maybe that's why I didn't show up any better, here the other night, when Vee rings in this silent alarm on me.

    The House of Torchy | Sewell Ford