1 to sing

2 to call loudly

3 to chant

1 to sing a song

1 to lip-sync (singing)

1 chorus

2 to chorus

1 chorus

2 choir

1 to echo one another (idiom)

1 to put on a rival show (idiom); to set oneself up against sb

2 to get into confrontation

1 to play the role of the villain (idiom)

1 lit. to sing “The Empty City Stratagem” (idiom)

2 fig. to put up a bluff to conceal one's weakness

3 (jocularly) (of a place etc) to be empty

4 (of one's stomach) to be rumbling

1 to play the role of the hero (idiom)

2 to play the good cop