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.
The invention of electricity made menial jobs like the lamplighter, the elevator operator, and the knocker-up, the human equivalent to the modern alarm clock, irrelevant. Jake Angelo, Fortune, 6 Mar. 2026 Best Wooden Clock Here’s a wooden alarm clock with staunch minimalist appeal. Julia Harrison, Architectural Digest, 6 Mar. 2026 From a reputable air purifier that doubles as a sunrise alarm clock to an ergonomic pillow designed for side sleepers, here’s what’s worth checking out this weekend. Mariana Best, Better Homes & Gardens, 5 Mar. 2026 The Jall Wake Up Light Sunrise Alarm Clock features a dual alarm clock, which can accommodate two separate wake times. Bestreviews, Chicago Tribune, 5 Mar. 2026 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 13 Mar. 2026.

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

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