n. 1.any utterance produced simultaneously by a group 2.a group of people assembled to sing together 3.the part of a song where a soloist is joined by a group of singers 4.a body of dancers or singers who perform together 5.a company of actors who comment (by speaking or singing in unison) on the action in a classical Greek play chorus v. 1.utter in unison 2.sing in a choir