revolving door

1 ENTRIES FOUND:
revolving door noun
plural revolving doors
revolving door
noun
plural revolving doors
Britannica Dictionary definition of REVOLVING DOOR
1 
[count] : a type of door that turns in its frame when it is used and allows people to go both in and out of a large building at the same time
2 
[singular]
a  — used to describe a situation in which the people who have a particular job or position are constantly or frequently changing
b  — used to describe a situation in which someone leaves and returns to a place or position many times

— revolving–door

adjective, always used before a noun