whistle in WordNet English dictionary

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

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