whistle whistle /ˈhwɪsəl/

noun

1. An inexpensive fipple flute  ( pennywhistle , tin whistle , whistle )
   an inexpensive fipple flute
   
   
2. Acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound  ( whistle )
   acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound
    The referee blew his whistle to signal the end of the game.
   The referee blew his whistle to signal the end of the game.
   
   
3. A small wind instrument that produces a whistling sound by blowing into it  ( whistle )
   a small wind instrument that produces a whistling sound by blowing into it
    The coach blew his whistle to signal the end of the game.
   The coach blew his whistle to signal the end of the game.
   
   
4. The act of signalling (e.g., summoning) by whistling or blowing a whistle  ( whistle , whistling )
   the act of signalling (e.g., summoning) by whistling or blowing a whistle
    The whistle signalled the end of the game
   the whistle signalled the end of the game
   
5. The sound made by something moving rapidly or by steam coming out of a small aperture  ( whistle , whistling )
   the sound made by something moving rapidly or by steam coming out of a small aperture
   

verb

1. () Make whistling sounds  ( whistle )
   make whistling sounds
    He lay there, snoring and whistling
   He lay there, snoring and whistling
   
2. () Utter or express by whistling  ( whistle )
   utter or express by whistling
    She whistled a melody
   She whistled a melody
   
3. () Move with, or as with, a whistling sound  ( whistle )
   move with, or as with, a whistling sound
    The bullets whistled past him
   The bullets whistled past him
   
4. () Make a whining, ringing, or whistling sound  ( sing , whistle )
   make a whining, ringing, or whistling sound
    The kettle was singing
   the kettle was singing
    The bullet sang past his ear
   the bullet sang past his ear
   
5. () Move, send, or bring as if by whistling  ( whistle )
   move, send, or bring as if by whistling
    Her optimism whistled away these worries
   Her optimism whistled away these worries
   
6. Give a signal by whistling  ( whistle )
   give a signal by whistling
    She whistled for her maid
   She whistled for her maid