chorus
US /ˈkɔːr.əs/
UK /ˈkɔːr.əs/

1.
2.
a large group of people who sing together
:
•
The church chorus performed beautifully.
•
She joined the school chorus to improve her singing.
1.
to say something at the same time as many other people
:
•
The crowd chorused their approval.
•
They all chorused, 'Happy Birthday!'