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.
Best alarm clocks This classy-looking clock is fully analog and uses two bells to sound its alarm. Bestreviews, Mercury News, 8 May 2026 If so, the alarm clock is ringing. Kevin West, Travel + Leisure, 8 May 2026 Not peckish, not in need of a little boost—hungry, immediately and completely, hunger as urgent as any alarm clock. Helen Rosner, New Yorker, 3 May 2026 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 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 20 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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