student union
noun [ C usually singular ] uk/ˌstjuː.dənt ˈjuː.ni.ən/ us/ˌstuː.dənt ˈjuː.ni.ən/ (also students' union)
学生活动中心
the building or part of a building specially used by students to meet socially
UK（大学的）学生会
an organization of students in a college or university that arranges social events and sometimes helps to provide health services and places to live