bankrollPronunciation: /ˈbaŋkrəʊl/Translate bankroll | into French | into Italian Definition of bankroll noun North American a roll of banknotes. financial resources: his bankroll allowed him to run campaigns all over the US verb [with object] informal support (a person, organization, or project) financially:the project is bankrolled by wealthy expatriatesbankroll in other Oxford dictionaries Definition of bankroll in the US English dictionary