Longman Dictionary of Contemporary English - chorus

~1 n 1 »SONG« the part of a song that is repeated after each verse (=main part in a song)  (Evevyone joined in the chorus.) 2 »SINGERS« a large group of people who sing together  (- compare choir (1))  (the university chorus) 3 »MUSIC« a piece of music written to be sung by a large group of people  (the Hallelujah Chorus) 4 »GROUP IN MUSICAL PLAY« a group of singers, dancers, or actors who act together in a show but do not have the main parts  (a member of the chorus in the musical `42nd Street') 5 a chorus of thanks/disapproval/protest etc something expressed by many people at the same time + of  (Peggy's announcement brought a chorus of congratulation.) 6 in chorus if people say something in chorus, they say the same thing at the same time  (-Mom!-, the kids cried in chorus) 7 a) »PLAY« in ancient Greek plays, the chorus is the group of actors who give explanations or opinions about the play b) in English drama of the early 1600s, the chorus is usually one person who gives explanations or opinions about the play, especially at the beginning or the end ~2 v if two or more people chorus something, they say it at the same time  (-Good morning,- we chorused.)