silent alarm

noun

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.
any visual rather than audible alarm.

QUIZZES

DO YOU KNOW THIS VOCABULARY FROM "THE HANDMAID'S TALE"?

"The Handmaid's Tale" was required reading for many of us in school. Everyone else has probably watched the very popular and addictive TV show. Do you remember this vocabulary from the book, and do you know what these terms mean?
Question 1 of 10
decorum
the act of or need for making up one's mind.
dignified propriety of behavior, speech, dress, etc.
a company of singers, especially an organized group employed in church service.
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Words nearby silent alarm

silenced, silencer, silene, silenos, silent, silent alarm, silent area, silent auction, silent barter, silent butler, silent cop
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020