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

[ C ] a piece of music written to be sung by a choir (= group of singers):

[ C, + sing/pl verb ] a group of people who are trained to sing together:

[ C, + sing/pl verb ] a group of performers who, as a team, sing or dance in a show:

[ S, + sing/pl verb ] specialized literature a group of actors in ancient Greek plays who explained or gave opinions on what was happening in the play using music, poetry, and dance

[ C usually singular ] many people speaking together or saying a similar thing at the same time:

(of a group of people) to say similar things at the same time: