overdub Syllabification: (o·ver·dub)Definition of overdub verb Pronunciation: /ˌōvərˈdəb/ (overdubs, overdubbing, overdubbed) record (additional sounds) on an existing recording: [with object]:she’d overdub her parts for a whole album in a single session [no object]:a live tape that I overdubbed on noun Pronunciation: /ˈōvərdəb/ an instance of overdubbing:a guitar overduboverdub in other Oxford dictionaries Definition of overdub in the British & World English dictionary