ˌopen ˈletter BrE AmE noun [countable]
a letter to an important person, which is printed in a newspaper or magazine, usually in order to protest about something
ˌopen ˈletter BrE AmE noun [countable]
a letter to an important person, which is printed in a newspaper or magazine, usually in order to protest about something
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012