chorus

Short definition from Wiktionary

Noun

1. 1
   A group of singers and dancers in a theatrical performance or religious festival who commented on the main performance in speech or song.
2. 2
   A song performed by the singers of such a group.
3. 3
   An actor who reads the prologue and epilogue of a play, and sometimes also acts as a commentator or narrator; also, a portion of a play read by this actor.
4. 4
   A group of singers performing together; a choir; specifically, such a group singing together in a musical, an opera, etc., as distinct from the soloists; an ensemble.
5. 5
   A group of people in a performance who recite together.
6. 6
   An instance of singing by a group of people.
7. 7
   A group of people, animals, or inanimate objects who make sounds together.
8. 8
   The noise or sound made by such a group.
9. 9
   A group of people who express a unanimous opinion.
10. 10
    The opinion expressed by such a group.
11. 11
    A piece of music, especially one in a larger work such as an opera, written to be sung by a choir in parts (for example, by sopranos, altos, tenors, and basses).
12. 12
    A part of a song which is repeated between verses to emphasize the song's content; a refrain.
13. 13
    The main part of a pop song played after the introduction.
14. 14
    A group of organ pipes or organ stops intended to be played simultaneously; a compound stop; also, the sound made by such pipes or stops.
15. 15
    A feature or setting in electronic music that makes one instrument sound like many.
16. 16
    A simple, often repetitive, song intended to be sung in a group during informal worship.
17. 17
    The improvised solo section in a small group performance.

Verb

1. 1
   To sing (a song), express (a sentiment), or recite or say (words) in chorus.
2. 2
   To express concurrence with (something said by another person); to echo.
3. 3
   To provide (a song) with a chorus or refrain.
4. 4
   To sing the chorus or refrain of a song.
5. 5
   To sing, express, or say in, or as if in, unison.
6. 6
   To echo in unison another person's words.
7. 7
   Of animals: to make cries or sounds together.

Proper noun

1. 1
   A group of singers and dancers in a theatrical performance or religious festival who commented on the main performance in speech or song.
2. 2
   A song performed by the singers of such a group.