Lusitania2 Syllabification: (Lu·si·ta·ni·a)Pronunciation: /ˌlo͞osəˈtānēə/Definition of Lusitania a Cunard liner that was sunk by a German submarine in the Atlantic in May 1915 with the loss of over 1,000 lives. Lusitania in other Oxford dictionaries Definition of Lusitania in the British & World English dictionary