Dictionary definition · sing
verb
- deliver by singing"Sing Christmas carols"
- produce tones with the voice"She was singing while she was cooking"
- to make melodious sounds"The nightingale was singing"
- make a whining, ringing, or whistling sound"the kettle was singing"
- divulge confidential information or secrets"Be careful — his secretary talks"
Source: Open English WordNet (CC BY 4.0).