whistle

the sound made by something moving rapidly or by steam coming out of a small aperture

the act of signalling (e.g., summoning) by whistling or blowing a whistle; "the whistle signalled the end of the game"

a small wind instrument that produces a whistling sound by blowing into it

acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound

an inexpensive fipple flute

make whistling sounds; "He lay there, snoring and whistling"

move with, or as with, a whistling sound; "The bullets whistled past him"

utter or express by whistling; "She whistled a melody"

move, send, or bring as if by whistling; "Her optimism whistled away these worries"

make a whining, ringing, or whistling sound; "the kettle was singing"; "the bullet sang past his ear"

give a signal by whistling; "She whistled for her maid"