All 7 Uses

congregation
in
Severance
(Edited)

Following the congregation's lead, they opened the hymnals and stood up and mouthed the lyrics.
p. 178.3

congregation = group of people who worship together in the same building
He looked around at the congregation.
p. 179.2
Now we are all, in this congregation, first—and second-generation immigrants.
p. 179.2 *
The congregation stood up and applauded.
p. 179.5
Following the service, Zhigang and Ruifang followed the other congregation members downstairs to the musty, wood-paneled basement, where lunch was served.
p. 179.5
The congregation of CCCC consisted mostly of immigrants from southern China.
p. 179.7

Uses with a meaning too rare to warrant foucs:

The rain scattered the tourists as I ducked and weaved through their dense sidewalk congregations down Broadway, accidentally banging my knees into their Sephora and Disney Store bags.
p. 17.3 *

congregations = groups of people gathered closely together

Definitions:

(1) (congregation as in: the congregation voted)
people who worship together in the same building
(2) (meaning too rare to warrant focus)
Much more rarely, congregation can reference any group of people, animals, or things collected together.