A choir is a group of people who sing together, often as part of a religious service or concert. Choirs can vary in size and composition, and they typically perform choral music, which is written for multiple voices, often divided into different parts.
The word "choir" comes from the Old French word "quer" or "choeur," which itself is derived from the Latin word "chorus," meaning a group of singers or dancers. The Latin term has roots in the Greek word "khoros," which also pertains to a dance or a group of performers.