noun, noun or participle which takes 'suru', intransitive verb
crowding together; clustering; close formation; swarm
Describes people, objects, or organisms packed closely in a space. Often used in news about crowds, urban density, or swarms. The する form is intransitive.
駅前に人が密集している。
People are crowded together in front of the station.
この地域には小さな店
Small shops are clustered together in this area.