roman-fleuvePronunciation: /ˌrəʊmɒ̃ˈfləːv, ʀɔmɑ̃flœv/Definition of roman-fleuve noun (plural romans-fleuves pronunc. same) a novel featuring the leisurely description of the lives of closely related people. a sequence of related, self-contained novels. Origin:French, literally 'river novel'roman-fleuve in other Oxford dictionaries Definition of roman-fleuve in the US English dictionary