fifth column
B2Formal, Political, Journalistic
Definition
Meaning
A clandestine group or faction working within a country to support an external enemy, engaging in sabotage, espionage, or subversion.
Any group within an organization, community, or society that secretly works to undermine or betray it from within for the benefit of an opposing external force or ideology. Often used metaphorically in politics, business, or sports.
Linguistics
Semantic Notes
Primarily a historical-political term with strong negative connotations of betrayal and subversion. Often used metaphorically. It is a countable noun phrase (e.g., 'a fifth column', 'the fifth column', 'fifth columns').
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. The term is equally understood and used in political/journalistic contexts in both varieties.
Connotations
Identical strong negative connotations of treason and internal threat.
Frequency
Slightly higher frequency in UK media historically, due to the term's origins in the Spanish Civil War which was closely covered in Europe. In modern usage, frequency is comparable.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject: government/media/politician] + accuse + [Object: group/party] + of being a fifth column[Subject: group] + act as + a fifth column + for + [Object: enemy/foreign power]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “An enemy within”
- “A Trojan horse”
Usage
Context Usage
Business
Rare. Used metaphorically to describe a department or team secretly working for a competitor (e.g., 'The acquired team turned out to be a fifth column for our rivals.').
Academic
Used in historical, political science, and international relations contexts to discuss subversion and asymmetric warfare.
Everyday
Rare in casual conversation. Used in political discussions, often as a rhetorical accusation.
Technical
Used in military and intelligence discourse to describe clandestine insurgent or proxy forces operating within a population.
Examples
By Part of Speech
verb
British English
- The group was accused of fifth-columning for a foreign intelligence service.
- They feared disgruntled staff might try to fifth-column during the merger.
American English
- The senator claimed the activists were fifth-columning for the rival nation.
- He was fired for allegedly fifth-columning on behalf of a competitor.
adverb
British English
- This is highly unusual; the term is almost never used as an adverb.
American English
- This is highly unusual; the term is almost never used as an adverb.
adjective
British English
- The government warned of fifth-column activities designed to destabilise the economy.
- They were under surveillance for suspected fifth-column sympathies.
American English
- The report highlighted fifth-column elements within the political party.
- The agency monitors potential fifth-column networks.
Examples
By CEFR Level
- During the war, the government searched for a fifth column.
- The newspaper called the protesters a fifth column.
- The general claimed that enemy sympathisers were operating as a fifth column behind our lines.
- Political rivals often accuse each other of being a fifth column for foreign interests.
- The historian's thesis argued that the regime's paranoia about a domestic fifth column was largely unfounded but politically useful.
- The intelligence breach suggested not a simple hack, but the presence of a sophisticated fifth column within the organisation's senior ranks.
Learning
Memory Aids
Mnemonic
Think of an army attacking a fortress with four columns from the outside. The 'fifth column' is the secret group of traitors already INSIDE the fortress, opening the gates.
Conceptual Metaphor
THE NATION/ORGANIZATION IS A FORTRESS. SUBVERSION IS AN INTERNAL BREACH.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate as 'пятая колона' (incorrect). The correct Russian calque is 'пятая колонна' (with double 'n').
- Avoid confusion with 'пятый угол' (fifth corner), a Russian idiom for an imaginary/hard-to-find place.
- The term carries the same heavy accusatory weight as 'враг народа' (enemy of the people) in political rhetoric.
Common Mistakes
- Misspelling as 'fith column' (dropping the second 'f').
- Using it to refer to any internal opposition, rather than specifically one acting for an *external* enemy.
- Incorrect pluralisation: 'fifths column' instead of 'fifth columns'.
Practice
Quiz
What is the essential characteristic of a 'fifth column'?
FAQ
Frequently Asked Questions
It originated in the Spanish Civil War (1936-1939). Nationalist General Emilio Mola stated he was leading four columns of troops to attack Madrid, but had a 'fifth column' of supporters within the city who would rise up and help.
No. While it has a concrete historical and military meaning, it is now more commonly used as a powerful metaphor in political rhetoric to accuse any internal opposition of treasonous collaboration with an outside force.
A 'traitor' is an individual. A 'fifth column' refers to a *collective* or *organised group* of such individuals working together covertly from within a society or organisation.
Almost never. The term is inherently pejorative and accusatory. Those accused of being a fifth column would vehemently reject the label.