fire alarm definition, meaning - what is fire alarm in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “fire alarm”

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fire alarm

noun [C] uk   us  
a device such as a bell or siren that warns the people in a building that the building is on fire: If the fire alarm goes off (= starts making a sound), leave the building calmly.
(Definition of fire alarm from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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