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.
These bedside tables also quietly infuse the bedroom with some interior design personality by way of their accessories (think decorative table lamps, catchall trays, or high-design alarm clocks). Julia Harrison, Architectural Digest, 3 Mar. 2026 More picks for sleep Continue below for everything from white noise machines to smart alarm clocks, air purifiers, humidifiers and wearable tech. Claire Peltier, ABC News, 2 Mar. 2026 Cell phones have built-in alarm clocks, making the need for a separate wake-up device obsolete. Madeline Buiano, Martha Stewart, 8 Feb. 2026 The circadian rhythm, the body’s natural alarm clock that will suppress melatonin in the morning and increase alertness, is triggered by sunlight. Alexa Mikhail, Flow Space, 4 Feb. 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 9 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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