traitor

UK: /ˈtreɪtə^r/ US: /ˈtreɪtɚ/ ,(trā′tər)

WordReference Random House Learner's Dictionary of American English © 2025

trai•tor /ˈtreɪtɚ/   n. [countable]

1. one who betrays.

trai•tor•ous, adj. 

WordReference Random House Unabridged Dictionary of American English © 2025

trai•tor  (trā′tər), n. 

1. a person who betrays another, a cause, or any trust.
2. a person who commits treason by betraying his or her country.

• Latin trāditōr-, stem of trāditor betrayer. See traditor
• Old French
• Middle English 1175–1225

trai ′tor•ship′, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

traitor / ˈtreɪtə/ noun

1. a person who is guilty of treason or treachery, in betraying friends, country, a cause or trust, etc

Etymology: 13th Century: from Old French traitour, from Latin trāditor traditor

ˈtraitorous adjective

ˈtraitress noun:feminine