gathering of people; crowd; throng
Refers to a large number of people assembled in one place, often for an event or purpose. Can also imply the act of gathering people.
祭りにはすごい人集めができた。
A huge crowd gathered for the festival.
ボランティアの人集めに苦労した。
We struggled to gather volunteers.
Compound of 人 (ひと, 'person') and 集め (あつめ, the noun form of 集める 'to gather'). The exact historical derivation is uncertain, but the word follows a common pattern of noun formation from verb stems.