or student union
( students’ unions)
1.
The students’ union is the students’ organization in a university or college which organizes leisure activities, provides welfare services, and represents students’ political interests. ( BRIT )
N-COUNT : oft the N , oft in names
2.
The students’ union is the building where the students’ union organization has its offices and which usually has a shop, a coffee bar, and a meeting place.
N-SING : the N