Choir

n. singing group, chorus

A choir, chorale, or chorus is a musical ensemble of singers. A body of singers who perform together is called a choir or chorus. The former term is very often applied to groups affiliated with a church (whether or not they actually occupy the quire) and the second to groups that perform in theatres or concert halls, but this distinction is far from rigid. "Choir" has the secondary definition of a subset of an ensemble; thus one speaks of the "woodwind choir" of an orchestra, or different "choirs" of voices and/or instruments in a polychoral composition. In typical 18th to 20 century oratorios  and masses, chorus or choir is usually understood to imply more than one singer per part, in contrast to the quartet of soloists also featured in these works.
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Noun
1. a chorus that sings as part of a religious ceremony
(hypernym) chorus
(member-meronym) chorister
(derivation) chorus
2. a family of similar musical instrument playing together
(synonym) consort
(hypernym) set
(derivation) chorus
3. the area occupied by singers; the part of the chancel between sanctuary and nave
(hypernym) area
(part-holonym) chancel, sanctuary, bema
(derivation) chorus
Verb
1. sing in a choir
(synonym) chorus
(hypernym) sing
(derivation) consort
(classification) music

v. fall

(n.)
The chancel.
  

(n.)
That part of a church appropriated to the singers.
  

(n.)
A band or organized company of singers, especially in church service.