ˌfifth ˈcolumn BrE AmE noun [countable]
a group of people who work secretly to help the enemies of the country where they live or the organization in which they work
—fifth columnist noun [countable]
ˌfifth ˈcolumn BrE AmE noun [countable]
a group of people who work secretly to help the enemies of the country where they live or the organization in which they work
—fifth columnist noun [countable]
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012