Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “traitor”


noun [C] uk   /ˈtreɪ.tər/ us    /-t̬ɚ/ disapproving
a person who is not loyal or stops being loyal to their own country, social class, beliefs, etc.: The leaders of the rebellion were hanged as traitors. The Chinese Communist Party branded (= called) Mr Gorbachev "a traitor to socialism".Disloyalty, betrayal and treason
adjective uk   /-əs/ formal disapproving us  
(Definition of traitor from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of traitor?
Add Cambridge dictionaries to your browser to your website

Definitions of “traitor” in other dictionaries

Word of the Day


a measure for liquid equal to about half a litre

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More