noun
meeting; gathering; get-together
A somewhat formal or literary term for a gathering of people, often with a shared purpose or interest. Less casual than 集まり.
地域の集いに参加する。
I participate in a local community gathering.
卒業生の集いが開かれた。
A reunion of graduates was held.
集まり is the more common, everyday word for a gathering or meeting. 集い is slightly more formal or literary.
The noun form of the verb 集う (つどう, to gather), derived from the classical Japanese verb 集ふ (つどふ).