Meaning of “timer” in the English Dictionary

british dictionary

"timer" in British English

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timernoun [ C ]

uk /ˈtaɪ.mər/ us /ˈtaɪ.mɚ/

a device that makes a sound when a particular number of minutes, hours, etc. have gone past:

He set the timer on the oven to/for 20 minutes (= to record when 20 minutes had gone past).

UK also time switch a device on a machine that causes the machine to start or stop working at a particular point in the day

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

"timer" in American English

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timernoun [ C ]

us /ˈtɑɪ·mər/

a device that starts or stops something at a set time or that makes a sound after a particular amount of time has passed:

He set the timer on the VCR to start recording at 11:30.

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