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


false alarm

BrE BrE//ˌfɔːls əˈlɑːm//
; NAmE NAmE//ˌfɔːls əˈlɑːrm//
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a warning about a danger that does not happen; a belief that something bad is going to happen, when it is not The fire service was called out but it was a false alarm.
See the Oxford Advanced American Dictionary entry: false alarm