smoke detector

noun

: an alarm that activates automatically when it detects smoke

called also smoke alarm

Examples of smoke detector in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
That’s because our brains are home to the amygdala, which acts like an internal smoke detector. Laura Kiniry, Popular Science, 17 June 2026 Common items include antifreeze, motor oil, batteries (household & automotive), fluorescent bulbs, deck stains, pool chemicals, pesticides, and household smoke detectors. Post-Tribune, Chicago Tribune, 15 June 2026 Fire officials also encourage having working smoke and carbon monoxide detectors on every level of the home, including smoke detectors in every bedroom. Justin Muszynski, Hartford Courant, 10 June 2026 Officials say the home had smoke detectors, which woke up the mother. Jesse Zanger, CBS News, 27 May 2026 See All Example Sentences for smoke detector

Word History

First Known Use

circa 1927, in the meaning defined above

Time Traveler
The first known use of smoke detector was circa 1927

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Cite this Entry

“Smoke detector.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/smoke%20detector. Accessed 24 Jun. 2026.

Kids Definition

smoke detector

noun
: an alarm that activates automatically when it detects smoke

called also smoke alarm

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