A device designed to be placed in the mouth and blown, or driven by steam or some other mechanism, to make a whistling sound.
2
An act of whistling.
3
A shrill, high-pitched sound made by whistling.
4
Any high-pitched sound similar to the sound made by whistling.
the whistle of the wind in the trees
verb
1
To make a shrill, high-pitched sound by forcing air through the mouth. To produce a whistling sound, restrictions to the flow of air are created using the teeth, tongue and lips.
Never whistle at a funeral.
2
To make a similar sound by forcing air through a musical instrument or a pipe etc.
The stream train whistled as it passed by.
3
To move in such a way as to create a whistling sound.