Chorus  —n. (pl. -es) 1 group of singers; choir. 2 music composed for a choir. 3 refrain or main part of a song. 4 simultaneous utterance. 5 group of singers and dancers performing together. 6 gk antiq. A group of performers who comment on the action in a greek play. B utterance made by it. 7 character speaking the prologue in a play. —v. (-s-) speak or utter simultaneously. [latin from greek]