What does traitor mean?
A traitor is someone who breaks a bond of loyalty or trust, most often by serving an enemy, revealing confidential information, or acting against the country, organization, or people to which they have pledged allegiance. The word carries a strong moral condemnation and appears frequently in political, military, and espionage writing. It can also describe betrayal on a smaller scale, such as informing on friends, colleagues, or fellow members of a group. Calling someone a traitor is more serious than simply calling them dishonest: it implies not merely personal misconduct but a violation of allegiance. The related verb is now rare, while the noun remains firmly established in modern English. Its history reveals an interesting shift in meaning, since the Latin root originally referred to handing over or delivering, a neutral action that acquired the unmistakable sense of betrayal through betrayal itself.
A person who betrays allegiance, trust, or confidence, especially by aiding an enemy or acting against one's country, government, or group.
"The rebel leader was condemned as a traitor by the government he had once served."
Strongly condemnatory; especially common in political, military, and espionage contexts.
To betray or act disloyally, especially by violating allegiance or exposing trusted associates to danger.
"He traitored the cause by disclosing the movement's plans to the authorities."
Rare and now generally archaic or deliberately emphatic; the standard modern verb is betray.
The standard plural of the noun is traitors.
"The court convicted the traitors of betraying confidential information."
The word enters English through Latin tradere, meaning “to hand over” or “deliver”—the same root that produced trade, tradition, and betrayal.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does traitor come from?
The word entered Middle English through Old French traiteur, meaning “betrayer,” which was derived from Latin traditor, an agent noun formed from tradere, “to deliver, hand over, or betray.” Latin tradere was built from the prefix trans-, meaning “across,” and dare, “to give.” From the same Latin root English acquired words including trade, tradition, and betray, so the history of “traitor” is closely connected with the history of handing something over.
Related word forms
How traitor is actually used
The noun is strongly condemnatory and usually implies a serious breach of loyalty or trust. It is especially common in political, military, and espionage contexts, although it can describe betrayal within any group. The verb is rare and now sounds archaic or deliberately unusual; in modern English, betray is normally preferred.
Easily confused with traitor
A traitor is a person who betrays allegiance or trust, whereas traitorous is an adjective describing conduct or someone who is disloyal.