alarm clock

noun

: 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

Considering that the app in question might be an alarm clock or a calendar, allowing that permission may not immediately ring any alarm bells. — Alan Henry, PC Magazine, 31 July 2026

Bring practical items like alarm clocks, comfortable bedding, and a helpful laundry basket. — Natalia Gonzalez Blanco Serrano, The Spruce, 27 July 2026

For people who cannot easily get outside, sunrise alarm clocks such as the Philips SmartSleep Wake-Up Light and the Hatch alarm clock simulate sunrise indoors. — Hanna Wickes, Charlotte Observer, 25 July 2026

For people who wake before sunrise or live through dark winters, sunrise alarm clocks fill the gap. — Hanna Wickes, Sacbee.com, 25 July 2026

Word History

First Known Use

1662, in the meaning defined above

Rhymes for alarm clock

• aftershock
• antiknock
• arawak
• hollyhock
• interlock
• manioc
• shuttlecock
• tomahawk
• weathercock
• alcock
• beanstalk
• bedrock

Kids Definition

alarm clock

noun

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