choir
1. choir \'kwi-(-*)r\ n [ME quer, fr. OF cuer, fr. ML chorus, fr. L, chorus] 1: an organized company of singers esp. in church service 2: a group of instruments of the same class 3: an organized group of persons or things 4: a division of angels 5: the part of a church occupied by the singers or by the clergy; specif : the part of the chancel between sanctuary and nave 6: a group organized for ensemble speaking 2. choir vb : to sing or sound in chorus or concert 3. choir aj : of the class in a religious order bound to recite the Divine Office and devoted chiefly to the order's special work
Webster's English Dictionary