whistle
— Noun
– English
～ an inexpensive fipple flute
whistle buoy
— Noun
– English
～ a buoy that makes a whistling noise
whistle
— Noun
– English
～ the sound made by something moving rapidly or by steam coming out of a small aperture
whistle blower
— Noun
– English
～ an informant who exposes wrongdoing within an organization in the hope of stopping it; "the law gives little protection to whistleblowers who feel the public has a right to know what is going on"; "the whistleblower was fired for exposing the conditions in mental hospitals"
whistle
— Noun
– English
～ acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound