ping in WordNet English dictionary

1. sound like a car engine that is firing too early
   "the car pinged when I put in low-octane gasoline"; "The car pinked when the ignition was too far retarded"
   pink  ping  knock 
   
2. send a message from one computer to another to check whether it is reachable and active
   "ping your machine in the office"
   ping 
   
3. contact, usually in order to remind of something
   "I'll ping my accountant--April 15 is nearing"
   ping 
   
4. hit with a pinging noise
   "The bugs pinged the lamp shade"
   ping 
   
5. make a short high-pitched sound
   "the bullet pinged when they struck the car"
   ping 
   

1. a sharp high-pitched resonant sound (as of a sonar echo or a bullet striking metal)
   ping