Ringing

Ringing may mean:

Vibrations

 * Ringing (signal), unwanted oscillation of a signal, leading to ringing artifacts
 * Vibration of a harmonic oscillator
 * Bell ringing
 * Ringing (telephony), the sound of a telephone bell
 * Ringing (medicine), a ringing sound in the ears

Other uses

 * Bird ringing, using numbered small metal pr plastic leg rings to track birds
 * Ringing (of vehicles), the illegal practice of stealing a vehicle and replacing its identification number with that of another vehicle of the same model which has been a write-off