Noun
a subversive group that supports the enemy and engages in espionage or sabotage; an enemy in your midst
Source: WordNetI want to warn against the Fifth Column which is trying to hinder our free way of life in Holland. Theo Van Gogh
An American writer's intellectual energy ought to focus on American interests, first. Personal probity demands it! Otherwise, the columnist is a fifth column. Ilana Mercer
A wide ranging investigation rolled up many additional irredentist youths, and the fifth column that the Black Hand and Serbian Military Intelligence had tried to organize was eliminated. Source: Internet
On March 28, 1939, with the help of pro-Franco forces inside the city (the " fifth column " General Mola had mentioned in propaganda broadcasts in 1936), Madrid fell to the Nationalists. Source: Internet
Noting that the invaders have allowed the free practice of religion (the better to pacify their slaves), the Americans set up a church of their own in order to build a resistance movement—the Sixth Column (as opposed to a traitorous fifth column ). Source: Internet
A second investigation started in 1940, written by Naval Intelligence officer Kenneth Ringle and submitted in January 1942, likewise found no evidence of fifth column activity and urged against mass incarceration. citation Both were ignored. Source: Internet