o•ver•dub
Pronunciation: (v.ō"vur-dub'n.ō'vur-dub"), [key] — v., n. -dubbed, -dub•bing,
—v.i. - to add other recorded sound or music, as a supplementary instrumental or vocal track, to a taped musical track to complete or enhance a recording.
—v.t. - to add (a track or tracks) to a musical recording.
—n. - a recorded segment or layer of instrumental parts, vocalization, or sound effects integrated into a musical recording.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.