finale
n. countable B2 Upper Intermediate US //fəˈnæɫi// UK //fɪnˈɑːli// fi·nale
n. the last part of a show, a piece of music, or an event. It is usually the most exciting or important part of the whole performance.
n. the concluding part of a musical composition, theatrical performance, or public event, typically intended to be impressive or climactic.
The fireworks display was a perfect finale to the festival.
The audience stood up and cheered during the grand finale of the opera.
While the first two acts were somewhat slow, the dramatic finale provided a satisfying resolution that tied all the subplots together perfectly.
From Italian finale (“ending”), from Late Latin fīnālis, from Latin fīnis (“end; boundary, limit”). Doublet of final.
Usage
Often used with the adjective 'grand' to describe a large-scale or impressive ending.