Quick definitions from WordNet (ping)

▸ noun:  a sharp high-pitched resonant sound (as of a sonar echo or a bullet striking metal)
▸ noun:  a river in western Thailand; a major tributary of the Chao Phraya
▸ verb:  make a short high-pitched sound ("The bullet pinged when they struck the car")
▸ verb:  send a message from one computer to another to check whether it is reachable and active ("Ping your machine in the office")
▸ verb:  contact, usually in order to remind of something ("I'll ping my accountant--April 15 is nearing")
▸ verb:  hit with a pinging noise ("The bugs pinged the lamp shade")
▸ verb:  sound like a car engine that is firing too early ("The car pinged when I put in low-octane gasoline")
▸ name:  A female given name (rare: 1 in 100000 females; popularity rank in the U.S.: #3777)
▸ name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #11168)

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▸ Also see ping