Chor

...In the broad sense, it refers to a form of singing by a group, but in the narrow sense, it refers to a form of singing divided into several parts, especially when each part is sung by several singers. A single part is sung by several singers in unison, each part is sung by one person, called a duet, a form in which a soloist and a chorus interact with each other, called an antiphonal or compound chorus, and a form in which two or more groups interact with each other. Generally, there are children's choirs, male choirs, female choirs, and mixed choirs, and although there are two or more parts, a mixed four-part choir consisting of soprano, alto, tenor, and bass is considered the standard.

*Some of the terminology that mentions "Chor" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…広義には集団による歌唱の形をいうが，狭義にはいくつかの声部に分かれて歌う形，とくにその各声部が複数の歌い手で歌われる形をさす。単一声部を複数の歌い手で歌う形態を斉唱(ユニゾン)，各声部をそれぞれ1人で歌う形態を重唱，また独唱と合唱が掛合いをする形態を応唱，二つあるいはそれ以上のグループが互いに掛合いをする形態を交唱または複合唱という。一般に児童合唱，男声合唱，女声合唱，混成合唱があり，声部は2からあるが，ソプラノ，アルト，テノール，バスからなる混成4部が標準とされる。…

※「Chor」について言及している用語解説の一部を掲載しています。

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