encore
n. countablen. an extra performance at the end of a show because the audience keeps clapping. You shout this word when you want the band or actor to come back and play one more song.
n. an additional performance or repetition of a piece given by an entertainer at the end of a scheduled program in response to audience applause.
The band played three songs as an encore.
After the final curtain call, the pianist returned to the stage for a brief encore of a Chopin nocturne.
The crowd's thunderous ovation lasted nearly ten minutes, eventually compelling the weary lead singer to return for a final, unplanned encore that brought the house down.
Borrowed from French encore (“more, again”), and once used in this sense.
Often follows the verbs 'give', 'play', or 'perform'; can also be used as an interjection shouted by the audience.