smokebox Syllabification: (smoke·box)Pronunciation: /ˈsmōkˌbäks/Definition of smokebox noun a device for catching or producing and containing smoke, in particular. an oven for smoking food. the chamber in a steam engine or boiler between the flues and the funnel or chimney stack. another term for smoker (sense 4).smokebox in other Oxford dictionaries Definition of smokebox in the British & World English dictionary