From Longman Dictionary of Contemporary Englishannounceran‧nounc‧er /əˈnaʊnsə $ -ər/ noun [countable] 1 AMTsomeone who reads news or information on the television or radio2 someone who gives information to people using a loudspeaker or microphone, especially at an airport or railway station
Examples from the Corpus
announcer• Even the Granada announcer got in on the act.• Scully was the radio announcer for the Los Angeles Dodgers' games before moving to network television.• I held my breath as the announcer introduced the players for the first match.• In other words, the announcer would kill time until the telegraph details started flowing again.• The announcer said that the contestants had been chosen at random.• The announcer periodically notified everyone how much time remained.• The announcer warns people not to swim because of a dangerous fish. 