› [I or T] informal to send someone an electronic message which they receive on their screen or phone as soon as it is sent: ping sb about sth An intern accidentally pinged a mailing list about the Senator's position on the vote. Excited messages ping from phone to phone, as employees hear the news. › [T] to test whether an internet connection is working by using a program to contact an address: We test the performance of the wireless devices by uploading, downloading, and pinging a remote host.