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alarm clock

noun

Synonyms of alarm clocknext
: a clock that can be set to sound an alarm at a desired time

Examples of alarm clock in a Sentence

She set the alarm clock for six o'clock. The alarm clock went off at six o'clock.
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.
Using a sunrise alarm clock can help regulate circadian rhythm by slowly introducing light that mimics the morning sun. Angelica Stabile, FOXNews.com, 4 Dec. 2025 Plus, the SolarCycle Morph reduces blue light in the evening (emitting an amber glow instead) and can be set to brighten gradually in the morning, like a sunrise alarm clock. PC Magazine, 1 Dec. 2025 This alarm clock is the perfect holiday gift. Nashia Baker, Architectural Digest, 1 Dec. 2025 After Jack sells his alarm clock for the modern equivalent of nearly $20 million, he’s launched into the upper class and must figure out how to live as a wealthy entrepreneur. Roxana Hadadi, Vulture, 1 Dec. 2025 See All Example Sentences for alarm clock

Word History

First Known Use

1662, in the meaning defined above

Time Traveler
The first known use of alarm clock was in 1662

Browse Nearby Words

Cite this Entry

“Alarm clock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alarm%20clock. Accessed 7 Dec. 2025.

Kids Definition

alarm clock

noun
: a clock that can be set to sound an alarm at any desired time

More from Merriam-Webster on alarm clock

Last Updated: - Updated example sentences
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