A large room, usually in an educational institution, that serves both as a cafeteria and as an auditorium.
A room or building that is used alternately as a cafeteria and an auditorium, as in a school.
The definition of a cafetorium is a big room used as both a cafeteria and an auditorium.
A big room in a school which is used as a cafeteria and an auditorium is an example of a cafetorium.
Origin of cafetorium
Originated 1950–55, cafe(teria) + (audi)torium.