Meaning of closed shop | Babel Free

Definitions

1. A business or industrial establishment whose employees are required to be labor union members as a precondition to employment.
2. A facility that runs programs on behalf of others, giving them no oversight over execution but merely returning the output at the end.
   historical

Examples

“[...] about 90 per cent of the locomotive staff belong⟳ to one trade⟳ union and 10 per cent to another smaller one or to none, for there is no such thing in Switzerland as a "closed shop⟳".”

CEFR level