The term OPERA HOUSE HIGHLIGHT can be summarized as an ARIA, which is a type of musical composition. An ARIA is a self-contained piece for one voice, usually with orchestral accompaniment, and is often used in operas and oratorios. It is typically a solo performance, and is usually the most memorable part of an opera or oratorio. An ARIA is usually a song of emotion, and is often the highlight of an opera house performance.