closed-door policy
noun[C]
ukusCOMMERCE
thepracticeoflimitingbusinesswith othercountries,companies,organizations, etc.:
The government's closed-doorpolicyhas made itdifficultforforeigncountriestoimporttheirproductshere.
thepracticeofrefusingtoallowpeoplefrom othercountriestotravelin ormovetoyourcountry:
When Cubaannouncedit wouldletanyoneleavewhowantedto, the USadministrationreverted to acloseddoorpolicy,fearinganimmigrationtide.
thepracticeof doing thingssecretlyand notlettingthepublicknowabout them:
Asfaras thepressisconcerned, we areadoptinga closed-doorpolicy.