noun, noun or participle which takes 'suru', intransitive verb
Refers to a large number of people or animals gathered in one place. Can be used as a noun or as a suru-verb meaning 'to crowd' or 'to gather'.
See also: 群衆
駅前に大きな群集ができていた。
A large crowd had formed in front of the station.
観光客が広場に群集している。
Tourists are crowding into the square.