Chorus

[Sarah]

A band of singers and dancers.The Grecian tragedy was at first nothing but a chorus of singers.Dryden.

[Sarah]

In music-

The repeating part of a rock, pop, or country song that the main verses lead up and return to, usually the section where the title of the song is sung.
A common electronic effect used for guitar and other audio which takes a copy of the original audio signal, delays it by a number of milliseconds, and plays it back with the original signal, resulting in a warmer, spacious sound.
An organized group of singers

[Sarah]

The part in the song that gets really loud and people usually scream.

[Sarah]

The middle, and usually best known, section of a [song]. The chorus is currently under protection by the Musical Wildlife Conservation Effort, or MWCE, after [Tay Zonday] used many of the remaining choruses in the wild for his song [Chocolate Rain]. Although Zonday has been forgiven for his overhunting of the chorus, choruses are now only allowed to be used by professional musicians.

[Lanell]

part of a song that is repeated several times, usually after each verse (= set of lines) :

[Gregory]

A part of a song that is repeated after each verse, typically by more than one singer.