A room for balls or dancing.

The ballroom was an enchanted place inside a bubble formed from one of Jareth's crystal balls. Sarah entered the ballroom and danced with Jareth after she ate an enchanted peach given to her by Hoggle.

large room used mainly for dancing

Ballroom was a 1978 Broadway musical based on the 1975 Emmy Award-winning television drama Queen of the Stardust Ballroom. The book was adapted by Jerome Kaas from his original teleplay, and the score was composed by husband-and-wife songwriting team Alan and Marilyn Bergman. The production, directed and choreographed by Michael Bennett, was his first project following the "one singular sensation" known as A Chorus Line three years earlier.