OPERA SERIA Meaning of OPERA SERIA in English [ 'sɪərɪə ]■ noun ( plural opere serie ˌɒpere 'sɪərɪe )an opera, especially one of the 18th century in Italian, on a serious theme.OriginItal., lit. 'serious opera'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004