overdubDefinition of overdub verb Pronunciation: /əʊvəˈdʌb/ (overdubs, overdubbing, overdubbed) [with object] record (additional sounds) on an existing recording:he overdubbed vocals in the US noun Pronunciation: /ˈəʊvədʌb/ an instance of overdubbing:a guitar overduboverdub in other Oxford dictionaries Definition of overdub in the US English dictionary