What is the meaning of Voice-over?

A production technique, in which pictures are accompanied by the voice of an unseen actor or reporter. (Can we add an example for this sense?)

A voice-overed release, especially of foreign content. (Can we add an example for this sense?)

The voice audio track of such a broadcast. (Can we add an example for this sense?)

To supply the voice audio track for (a broadcast).

Source: wiktionary.org