a factory, business, etc. in which employees must all be members of a particular trade union 只雇用某工会会员的工厂（或企业等） CultureClosed shops were made illegal in Britain in 1990. In the US they were made illegal by the Taft-Hartley Act of 1947.an area of activity that is limited to a particular small group 只雇用某工会会员的工厂（或企业等） The club's management is a closed shop. 俱乐部的管理层是一家封闭式商店。