caller ID

Noun

 * 1)  The telephone number and/or name of the originator of an incoming telephone call, displayed on the screen of the telephone or other electronic device receiving the call.
 * 2)  The service of providing such information, sometimes included in one's standard telephone contract and sometimes available for an extra fee.
 * 1)  The service of providing such information, sometimes included in one's standard telephone contract and sometimes available for an extra fee.