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.
Waking up and staying awake is the hardest part of the day for many, but this alarm clock can make the whole process much smoother. Bestreviews, Chicago Tribune, 30 Apr. 2026 Natural light comes into the loft on all sides, so feel free to turn off your alarm clock and let the sun wake you on its own. Lydia Mansel, Travel + Leisure, 23 Apr. 2026 However, an alarm clock that emits bright, blue light can disrupt sleep and send our minds into a frenzy of thoughts. Mary Marlowe Leverette, The Spruce, 23 Apr. 2026 Buy a tiny folding travel alarm clock. Marla Jo Fisher, Oc Register, 15 Apr. 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 1 May. 2026.

Kids Definition

alarm clock

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

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