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.
The department is still investigating if smoke detectors were present. Cheryl Vari, Cincinnati Enquirer, 15 Feb. 2026 Cities can, but don’t have to, require smoke detectors, carbon monoxide alarms and fire extinguishers. Mark Dee, Idaho Statesman, 10 Feb. 2026 None of the homes damaged in the fire had working smoke detectors, according to officials. Alexandra Simon, CBS News, 4 Feb. 2026 The result may be a blaring smoke detector, burning eyes, and difficulty breathing. Hallie Milstein, Southern Living, 4 Feb. 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

Browse Nearby Words

Cite this Entry

“Smoke detector.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/smoke%20detector. Accessed 21 Feb. 2026.

Kids Definition

smoke detector

noun
: an alarm that activates automatically when it detects smoke

called also smoke alarm

More from Merriam-Webster on smoke detector

Last Updated: - Updated example sentences
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