noun
dense wood; thick forest
Literary or descriptive term for a thick, overgrown forest. Not an everyday word; 密林 (みつりん) is more common for 'dense jungle/forest'.
その山の奥には深い叢林が広がっている。
Deep in the mountains, a dense forest spreads out.
noun
large Zen temple; monastery
Buddhist term. Originally referred to a place where monks gathered like trees in a forest; now a formal name for a major Zen training monastery.
永平寺は有名な叢林の一つです。
Eihei-ji is one of the famous large Zen temples.