fifth columnnoun [ C ]
uk/ˌfɪfθ ˈkɒl.əm/us/ˌfɪfθ ˈkɑː.ləm/a group of people who support the enemies of the country they live in and secretly help them
Thesaurus: synonyms and related words
Disloyalty, betrayal & treason
- adultery
- backstabber
- betray
- betrayal
- break ranks idiom
- collaborate
- deserter
- desertion
- double-cross
- faithless
- false
- high treason
- inconstant
- sellout
- stab
- stab sb in the back idiom
- traitor
- treacherous
- treachery
- treason
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fifth-columnist
noun [ C ] ukus
a member of such a group