whistling
nounUK /ˈwɪs.əl.ɪŋ/
US /ˈwɪs.əl.ɪŋ/
Whistling is the sound you make by blowing air through your lips or teeth.
The whistling of the wind kept me awake all night.
OTHER MEANINGS
2. The act of making a high sound by forcing air through a small opening.
His whistling annoyed the librarian.
3. A high-pitched sound made by an object moving quickly through the air.
We heard the whistling of the kettle as the water boiled.
4. The sound made by a bird or animal.
The whistling of the birds woke us at dawn.