A chorus is a group of SINGERS that typically perform together in a musical or theatrical production. The term 'chorus, e.g.' can be used to refer to any group of SINGERS, such as a choir or a glee club. Choruses are often used to provide background vocals and harmony to a song or performance. They may also be used to provide a counterpoint to the lead singer or soloist. Choruses can range from small groups of a few SINGERS to large groups of hundreds of SINGERS.