Open English Wordnet
Nouns
(n)chorusany utterance produced simultaneously by a group“a chorus of boos” (n)chorusa group of people assembled to sing together (n)refrain, chorusthe part of a song where a soloist is joined by a group of singers (n)chorus, Greek chorusa company of actors who comment (by speaking or singing in unison) on the action in a classical Greek play Verbs
(v)chorusutter in unison“‘yes,’ the children chorused” 