Pronunciation: (kwīur),[key] —n. 1. a company of singers, esp. an organized group employed in church service.
2. any group of musicians or musical instruments; a musical company, or band, or a division of one: string choir. 3. Archit. a. the part of a church occupied by the singers of the choir.
b. the part of a cruciform church east of the crossing.
4. (in medieval angelology) one of the orders of angels.
—adj. professed to recite or chant the divine office: a choir monk.