Meaning of “alarm clock” in the English Dictionary

british dictionary

"alarm clock" in British English

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alarm clocknoun [ C ]

uk /əˈlɑːm ˌklɒk/ us /əˈlɑːrm ˌklɑːk/ also alarm

A2 a clock that you can set to wake you up at a particular time with a loud noise:

My alarm clock went off at 7.30.
I've set the alarm for 7.30.

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(Definition of “alarm clock” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"alarm clock" in American English

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alarm clocknoun [ C ]

us /əˈlɑrm ˌklɑk/

a clock that you can set to make a noise at a particular time, esp. to wake you from sleep

(Definition of “alarm clock” from the Cambridge Academic Content Dictionary © Cambridge University Press)