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.
Songs of the Irish Republican Army, a rusty alarm clock placed inside a bag and nailed to a wall, and feats of strength competitions were all up the boozy patriarch’s sleeve — all of this was likely too much for the Seinfeld audience. Kevin Dolak, HollywoodReporter, 23 Dec. 2025 An event-timer rejects the alarm clock, maybe waking up at 6 o’clock, maybe at 9. Shayla Love, The Atlantic, 21 Dec. 2025 That means using a real alarm clock to wake up. Jennifer Liu, CNBC, 18 Dec. 2025 With his new gig, Tony Dokoupil may be able to hit snooze on his early bird alarm clock. Edward Segarra, USA Today, 10 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 29 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
Love words? Need even more definitions?

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