factory whistle

1. 1.

   a whistle at a factory that is sounded to announce times for starting or stopping work

   Broaderwhistle

Questions about factory whistle

What does factory whistle mean?

factory whistle means "a whistle at a factory that is sounded to announce times for starting or stopping work".

Is factory whistle a common word?

factory whistle is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.