Webster's Revised Unabridged Dictionary · 1913

Choir

Choir , noun

[Old English quer, Old French cuer, French chour, from Latin chorus a choral dance, chorus, choir, from Greek {not transcribed}, orig. dancing place; prob. akin to {not transcribed} inclosure, Latin hortus garden, and English yard. See Chorus.]

1.
A band or organized company of singers, especially in church service.
2.
That part of a church appropriated to the singers.
3.
(Architecture) The chancel.
Collocations (3)
Choir organ (Music) , one of the three or five distinct organs included in the full organ, each separable from the rest, but all controlled by one performer; a portion of the full organ, complete in itself, and more practicable for ordinary service and in the accompanying of the vocal choir.
Choir screen or Choir wall (Architecture) , a screen or low wall separating the choir from the aisles.
Choir service , the service of singing performed by the choir. — T. Warton