HyperDic: factory_whistle

English > 1 sense of the expression factory whistle:
NOUNartifactfactory whistlea whistle at a factory that is sounded to announce times for starting or stopping work
English > factory whistle: 1 sense > noun 1, artifact
MeaningA whistle at a factory that is sounded to announce times for starting or stopping work.
Broaderwhistleacoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound

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