IPA: /ɔːˈrɑːtəri.oʊ/
KK: /ɔˈrɑːtəriˌoʊ/
A type of musical work that is performed by singers and an orchestra, usually telling a religious story, but without acting or scenery.
The choir performed a beautiful oratorio that moved the audience to tears.
Oratorio is derived from the Latin "orare" (meaning to speak or pray) and the suffix "-orium" (indicating a place). The word refers to a place for speaking or praying, specifically a musical composition for voices and instruments that tells a story, often religious in nature.
Think of 'speaking' ('orare') in a special 'place' ('-orium') — that's why an oratorio is a musical piece that tells a story, often in a place of worship.