IPA: /riˈjuːniən/
KK: /riˈjun/
A gathering where people who have been apart come together again, often to celebrate or reconnect.
The high school reunion was a great opportunity to catch up with old friends.
Reunion → It is formed from "re-" (meaning again) and "unio" (from Latin, meaning union or joining). The word "reunion" means the act of coming together again after a period of separation.
Think of coming together 'again' ('re-') to form a 'union' ('unio') — that's what a reunion is all about.