Englishfifth columnnounMeaningA group of people which clandestinely undermines a larger group, such as a nation, to which it is expected to be loyal.Related wordstrojan horse(English)5th column(English)enemy of the people(English)side(English)cult(English)disloyalist(English)counterpublic(English)counterallegiance(English)SourcesDictionaryAPI.dev English dictionary data