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Definition of smoke alarm noun from the Oxford Advanced Learner's Dictionary

smoke alarm

noun
 
/ˈsməʊk əlɑːm/
 
/ˈsməʊk əlɑːrm/
(also smoke detector)
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  1. a device that makes a loud noise if smoke is in the air to warn you of a fireTopics Houses and homesb2
See smoke alarm in the Oxford Advanced American Dictionary
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verb
 
 
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