| Noun | 1. | choir - a chorus that sings as part of a religious ceremonychorus - a group of people assembled to sing together | |
| 2. | choir - a family of similar musical instrument playing togetherset - a group of things of the same kind that belong together and are so used; "a set of books"; "a set of golf clubs"; "a set of teeth" | |
| 3. | choir - the area occupied by singers; the part of the chancel between sanctuary and navearea - a part of a structure having some specific characteristic or function; "the spacious cooking area provided plenty of room for servants" bema, chancel, sanctuary - area around the altar of a church for the clergy and choir; often enclosed by a lattice or railing | |
| Verb | 1. | choir - sing in a choirmusic - musical activity (singing or whistling etc.); "his music was his central interest" sing - produce tones with the voice; "She was singing while she was cooking"; "My brother sings very well" | |