CHORUS, noun

1. A number of singers; a company of persons singing in concert.

2. The persons who are supposed to behold what passes in the acts of a tragedy, and sing their sentiments between the acts.

3. The song between the acts of a tragedy.

4. Verses of a song in which the company join the singer; or the union of a company with a singer, in repeating certain couplets or verses, at certain periods in a song.

5. A musical composition of two or more parts.

6. Among the Greeks, a chorus consisted of a number of singers and dancers.