What is Chorus ?
Chorus is (noun) 1. a group of people who sing together All the members of the chorus were on the stage. 2. a part of a song which is repeated later in the song I’ll sing the verses and everyone can join in the chorus. (NOTE: The plural is choruses.)(verb) to say something all together There was a knock at the door and they both chorused ‘come in’.
source: Easier English, Student Dictionary Upper Intermediate Level