overdub

US: (v. ō′vər dub′; n. ō′vər dub′)

Inflections of 'overdub' (v): (⇒ conjugate)

overdubs

v 3rd person singular

overdubbing

v pres p

overdubbed

v past

overdubbed

v past p

WordReference Random House Unabridged Dictionary of American English © 2025

o•ver•dub  (v. ō′vər dub′;n. ō′vər dub′), v., -dubbed, -dub•bing, n. 
v.i. 

1. Music, Sound Reproduction 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. 

2. Music, Sound Reproduction to add (a track or tracks) to a musical recording.

n. 

3. Music, Sound Reproduction a recorded segment or layer of instrumental parts, vocalization, or sound effects integrated into a musical recording.

• over- + dub⁴ 1965–70

Collins Concise English Dictionary © HarperCollins Publishers::

overdub(in multitrack recording) verb / ˌəʊvəˈdʌb/ ( -dubs, -dubbing, -dubbed)

1. to add (new sound) on a spare track or tracks

noun / ˈəʊvəˌdʌb/

1. the addition of new sound to a recording; the blending of various layers of sound in one recording