alarm clock

noun

: 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.
How many alarm clocks will need to be sold to make back that whopper of an investment? Alex Zalben, Vulture, 14 July 2025 The spot sees Robinson pivot from comedy to small business ownership with a big idea: an AI alarm clock designed to spread good vibes for fellow entrepreneurs. Shania Russell, EW.com, 9 July 2025 Having a space to hold valuables, an alarm clock, books, and a lamp makes all the difference in creating a space that is comfortable and functional. Rachel Trujillo, People.com, 14 June 2025 Most sleep scientists advise against pressing the snooze button after the alarm sounds on an alarm clock or a smartphone, as the sleep that snoozing provides isn’t particularly beneficial. Sam Walters, Discover Magazine, 19 May 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 19 Aug. 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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