What is "voiceovers"

Usage examples of "voiceovers".

As he walked quickly through the streets, he liked to think of descriptive lines like that, lines derived from the voiceovers in many of the old movies he’d viewed.

No voiceovers, no soundtrack, no living color, except in Brendan's head.

Danny, only eight years old, but already well-known as an actor, doing voiceovers for cartoons .