choir

A choir is a group of singers who perform music together, often with parts arranged to produce harmony. The term derives from the Latin chorus, via Old French, ultimately from Greek choros. A choir typically sings with multiple voice parts, such as soprano, alto, tenor, and bass (SATB); smaller configurations like SSA, TTBB are common, as are children's choirs and all-male or all-female groups.

Choirs are directed by a conductor or musical director who selects repertoire, leads rehearsals, and interprets scores. Rehearsals emphasize balance, blend, intonation, rhythm, diction, and dynamic shaping. Auditions are common, particularly for more selective ensembles.

Repertoire ranges from Renaissance polyphony to Baroque, Classical, Romantic, and contemporary choral works, as well as liturgical and secular pieces. Some choirs perform a cappella, others with accompaniment from organ, piano, or instrumental ensembles.

Settings include churches, cathedrals, concert halls, schools, and community venues; choirs may participate in festivals and tours. Professional choirs employ specialized singers, while community and school choirs are typically non-professional.

Difference between choir and chorus: in British English, choir often refers to sacred or church ensembles; chorus is more common for secular groups in American usage, though both terms can be used interchangeably in some contexts.