reunion          
noun uk/ˌriːˈjuː.njən/ us/ˌriːˈjuː.njən/
C2 [ C ]团聚,聚会 
a social event for a group of people who have not seen each other for a long time
  We're having a family reunion next week. 我们下周有一个家庭团圆会。 
 The college has an annual reunion for former students. 这个大学每年度为校友举行一个聚会。 
 C2 [ C or U ]重聚,重逢 
a situation when people meet again after they have not seen each other for a long time
  She had a tearful reunion with her parents at the airport. 她和父母在机场重逢,流下了眼泪。