reunion
/ˌriːˈjuːnjən/noun
1- an instance of two or more people coming together again after a period of separation团聚, 团圆：
she had a tearful reunion with her parents.
她和她的父母团聚时泪流满面。
1.1
- a social gathering attended by members of a certain group of people who have not seen each other for some time重聚, 重聚联欢会：
a school reunion.
校友重聚联欢会。
1.2
- mass noun the act or process of being brought together again as a unified whole再联合, 重新统一：
the reunion of East and West Germany.
东德和西德的重新统一。
词源
early 17th cent.: from French réunion or Anglo-Latin reunio（n-）, from Latin reunire 'unite'.