part of a song that is repeated several times, usually after each verse (= set of lines)

I'll sing the verses and I'd like you all to join in the chorus. 我唱独唱部分，我希望你们都加入合唱。

They burst into a chorus of (= they sang the song) Happy Birthday. 他们突然开始齐唱“祝你生日快乐”。

a piece of music written to be sung by a choir (= group of singers)

The choir will be performing the Hallelujah Chorus at the concert. 唱诗班将在音乐会上演唱《哈利路亚大合唱》。

a group of people who are trained to sing together

He sings with the Los Angeles Gay Men's Chorus. 他在洛杉矶男同性恋合唱团演唱。

a group of performers who, as a team, sing or dance in a show

She quickly left the chorus for a starring role. 她很快离开歌舞队去出演一个主要角色。

a chorus girl 歌舞队女演员

a group of actors in ancient Greek plays who explained or gave opinions on what was happening in the play using music, poetry, and dance

many people speaking together or saying a similar thing at the same time

The newcomers added their voices to the chorus expressing delight at the result. 新来的人和大家一起为这个结果欢呼雀跃。

There was a chorus of disapproval/complaint/condemnation at his words (= everyone complained together). 大家一致反对／抱怨／谴责他说的话。

(of a group of people) to say similar things at the same time

"Not now," the children chorused in unison, "we're watching TV." “现在不要，”孩子们齐声嚷道，“我们正在看电视。”