treason
C1Formal, Legal, Historical, Literary
Definition
Meaning
The crime of betraying one's country, especially by attempting to kill or overthrow the sovereign or government.
The betrayal of trust or allegiance; any act of disloyalty or treachery, especially against an organization, cause, or person to whom one owes fidelity.
Linguistics
Semantic Notes
Historically associated with the highest crimes against the state (e.g., regicide). In modern contexts, often used in political discourse and law. Carries extreme moral condemnation. The legal definition varies by jurisdiction but typically requires an overt act and intent.
Dialectal Variation
British vs American Usage
Differences
No significant difference in core meaning or legal definition. Both use 'high treason' and 'petty treason' historically, though 'petty treason' (betraying a master, husband, etc.) is now archaic. The spelling is identical.
Connotations
Strongly negative in both varieties. In the UK, heavily associated with historical events (Gunpowder Plot, WWII). In the US, associated with the American Revolution (Benedict Arnold) and modern espionage cases.
Frequency
Comparable frequency. Slightly more common in UK media due to historical and constitutional monarchy context.
Vocabulary
Collocations
Grammar
Valency Patterns
treason against [country/sovereign]treason by [person/group]charge someone with treasonconvict someone of treasonVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “High treason”
- “Petty treason (archaic)”
Usage
Context Usage
Business
Rare. Used metaphorically for extreme betrayal of company secrets to a direct competitor: 'Sharing the merger plans was an act of corporate treason.'
Academic
Common in History, Political Science, and Law. Discussed in contexts of state formation, constitutional law, and political theory.
Everyday
Used hyperbolically for minor betrayals among friends or family: 'Eating the last biscuit was treason!'
Technical
Strict legal term. Defined precisely in statutes (e.g., UK Treason Act 1351, US Constitution Article III).
Examples
By Part of Speech
verb
British English
- Historically, one could 'treason' against the Crown, but this verb form is now obsolete.
American English
- The verb 'treason' is archaic and not used in modern American English.
adverb
British English
- The word 'treasonously' exists but is exceedingly rare in modern usage.
American English
- 'Treasonously' is a valid but very uncommon adverb.
adjective
British English
- His treasonous plot was discovered by MI5.
- They were involved in treasonable activities.
American English
- She was convicted for treasonous acts of espionage.
- The senator's behaviour was deemed treasonable.
Examples
By CEFR Level
- The king was angry because of the man's treason.
- In the story, the knight was executed for treason against the king.
- The spy was found guilty of high treason for selling state secrets to a foreign power.
- The legal definition of treason, enshrined in the 14th-century statute, requires proof of an overt act intending to harm the sovereign or aid the enemy.
Learning
Memory Aids
Mnemonic
Think: 'TREAson' sounds like 'TREAchery' against the 'SON' of the country (the sovereign). It's the ultimate betrayal.
Conceptual Metaphor
TREASON IS A DISEASE IN THE BODY POLITIC. (e.g., 'a cancer of treason', 'root out treason'). TREASON IS A STAIN ON HONOUR.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'измена' in its broad sense of 'cheating on a partner'. English 'treason' is almost exclusively political/state betrayal.
- The Russian legal term 'государственная измена' is the direct equivalent.
- Avoid using 'treason' for simple workplace disloyalty; use 'betrayal' instead.
Common Mistakes
- Using 'treason' interchangeably with 'traitor' (noun vs. person).
- Misspelling as 'treson' or 'trechery'.
- Using in overly casual contexts where 'betrayal' is more appropriate.
- Confusing with 'sedition' (inciting rebellion vs. betraying the state to an enemy).
Practice
Quiz
Which of the following is the LEAST accurate synonym for 'treason' in a modern legal context?
FAQ
Frequently Asked Questions
Treason involves betraying one's country to an enemy or attempting to overthrow the sovereign. Sedition involves inciting rebellion or violence against the authority of the state, but not necessarily aiding an external enemy.
Yes. Modern legal definitions of treason in democracies typically involve levying war against the state or adhering to its enemies, providing them with aid and comfort.
No, it is very rare in modern Western democracies due to its severity, the difficulty of proof, and the existence of other statutes covering espionage and terrorism.
It is the most serious degree of treason, historically distinguished from 'petty treason' (e.g., a servant killing a master). In modern usage, 'treason' usually implies 'high treason'.
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