BONA VACANTIA Meaning of BONA VACANTIA in English [ ˌbəʊnə və'kantɪə ]■ noun Law (in the UK) goods without an apparent owner, to which the Crown may have right.OriginL., 'ownerless goods'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004