oratorio
Concise Oxford English Dictionary © 2008 Oxford University Press:
oratorio /ˌɒrəˈtɔːrɪəʊ/
▶noun (pl. oratorios) a large-scale semi-dramatic musical work for orchestra and voices on a sacred theme, performed without costume, scenery, or action.
– origin Ital., from eccles. L. oratorium ‘oratory’, from the musical services held in the church of the Oratory of St Philip Neri in Rome.
'oratorio' also found in these Oxford entries:
