Overdub – The process of adding additional tracks or sounds to a recording

(Pronounced oh-vuh-dub)

To remember what overdub means, use the following mnemonic:

Her trainset was over double (overdub) the size of mine, and she's still adding additional tracks.

A simple example of overdubbing would be recording yourself singing over a karaoke song (no singing). There is very little modern music that is not built up (overdubbed) track by track, unless it's recorded live.