louvar Syllabification: (lou·var)Pronunciation: /ˈlo͞oˌvär/Definition of louvar noun a large, brightly colored fish with a distinctive high forehead. It lives in warm open seas, feeding on jellyfishes and comb jellies. Luvarus imperialis, the only member of the family Luvaridae Origin:alteration of Latin namelouvar in other Oxford dictionaries Definition of louvar in the British & World English dictionary