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.
The ancient Greeks are also credited with giving us the yo-yo, the alarm clock, and the holy water dispenser—like a vending machine of sorts. — Encyclopedia Britannica, 9 Oct. 2026 The Restore 3 has been the one to get for years, until Hatch recently released its Sleep Clock—a new take on the popular sunrise alarm clock that actually tracks your sleep quality without a screen or wearable. — Kelsey Fogarty, PC Magazine, 7 Oct. 2026 Alongside wireless lamps and smart calendars, the current shortlist includes candle warmer lamps, heated throw blankets, essential-oil diffusers, sunrise alarm clocks and rainfall showerheads. — Lauren Jarvis-Gibson, Charlotte Observer, 30 Sep. 2026 At the historic Rose Bridge Farm in Dresher, Pennsylvania, there's no alarm clock quite like a cow's morning moo. — Wakisha Bailey, CBS News, 29 Sep. 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

Rhymes for alarm clock

See All Rhymes for alarm clock

Browse Nearby Words

alarm bird
alarm clock
alarmed
See all Nearby Words

Cite this Entry

“Alarm clock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alarm%20clock. Accessed 20 Oct. 2026.

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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

Thesaurus: All synonyms and antonyms for alarm clock

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