A gathering or meeting; an assembly; the act or result of people or things coming together; attendance/collection.
明日の集まりは午後2時から始まります。
Tomorrow's gathering starts at 2 PM.
小さな集まりを友人と開いた。
I had a small get-together with friends.
会議の集まりが思ったより多かった。
The turnout at the meeting was higher than expected.