factory whistle

/ˌfæktəri ˌwɪsəl/
/ˌfæktəri ˌhwɪsəl/
IPA guide

Other forms: factory whistles

Definitions of factory whistle
  1. noun
    a whistle at a factory that is sounded to announce times for starting or stopping work
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    type of:
    whistle
    acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound
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