What is the meaning of fifth column?

noun

  • A subversive group that supports the enemy and engages in espionage or sabotage; an enemy in your midst.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). fifth column. Retrieved September 21, 2026, from http://smartdefine.org/fifth_column/definitions/1223619
ChicagoWordNet. 2010. "fifth column" http://smartdefine.org/fifth_column/definitions/1223619 (accessed September 21, 2026).
HarvardWordNet 2010, fifth column, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/fifth_column/definitions/1223619>.
MLAWordNet. "fifth column" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/fifth_column/definitions/1223619>