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.
Common household hazardous waste items include antifreeze, motor oil, batteries, paints, pesticides and household smoke detectors. Post-Tribune, Chicago Tribune, 4 Aug. 2025 Like all smoke detectors, the Nest Protect comes with an expiration date. ArsTechnica, 28 Mar. 2025 These include access to clean water, working smoke detectors and safe heating systems. Quinn Clark, jsonline.com, 15 July 2025 The best places to look for hidden cameras are around electronics, like alarm clocks and lamps, in smoke detectors and thermostats, and vents and television consoles, as these are common areas where people report finding hidden cameras. Olivia Young, Travel + Leisure, 8 July 2025 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 Aug. 2025.

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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!