QUINQUENNIAL Meaning of QUINQUENNIAL in English quinquenni|al BrE AmE kwɪŋ ˈkwen i‿|əl kwɪn- ▷ quinquenni|a ə▷ quinquenni|ally əl‿i▷ quinquenni|um əm Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012