singing singing /ˈsɪŋɪŋ/

adjective

1. (music) smooth and flowing  ( cantabile , singing )
   (music) smooth and flowing
   

noun

1. () The act of singing vocal music  ( vocalizing , singing )
   the act of singing vocal music
     Her beautiful singing voice captivated the audience.
   Her beautiful singing voice captivated the audience.
   
2. [Informal] Disclosing information or giving evidence about another  ( singing [Informal] , tattle , telling )
   disclosing information or giving evidence about another
   
   

 sing sing /ˈsɪŋ/

verb

1. () Deliver by singing  ( sing )
   deliver by singing
    Sing Christmas carols
   Sing Christmas carols
   
2. () Produce tones with the voice  ( sing )
   produce tones with the voice
    She was singing while she was cooking
   She was singing while she was cooking
    My brother sings very well
   My brother sings very well
   
3. () To make melodious sounds  ( sing )
   to make melodious sounds
    The nightingale was singing
   The nightingale was singing
   
4. () [Informal] Divulge confidential information or secrets  ( babble , babble out , blab out [Informal] , blab [Informal] , let the cat out of the bag , peach [Informal] , spill the beans , tattle , give the game away , sing [Informal] , talk )
   divulge confidential information or secrets
    Be careful--his secretary talks
   Be careful--his secretary talks
   
5. () 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