From Longman Dictionary of Contemporary Englishvoice-overˈvoice-over noun [countable] AMTinformation or remarks that are spoken on a television programme or film by someone who is not seen on the screen
Examples from the Corpus
voice-over• The death of a giant, -intones a voice-over.• The ad is thought to follow the theme of past press advertising, with a celebrity voice-over.• Two disc jockeys would compete with each other in the clubs, taking turns to do their voice-over on the discs. 