Pluviose Syllabification: (Plu·vi·ose)Pronunciation: /ˈplo͞ovēˌōs/ (also Pluviôse /plYˈvyôs/)Definition of Pluviose noun the fifth month of the French Republican calendar (1793–1805), originally running from January 20 to February 18. Origin:French Pluviôse, from Latin pluviosus 'relating to rain'Pluviose in other Oxford dictionaries Definition of Pluviose in the British & World English dictionary