noun
a member of a clandestine subversive organization who tries to help a potential invader
• Syn: ↑saboteur
• Hypernyms: ↑traitor, ↑treasonist
• Member Holonyms: ↑fifth column, ↑Trojan horse
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nounsee fifth column
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fifth columnist /kolˈəm-ist/ noun
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Main Entry: ↑fifth
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Thesaurus: disloyal peoplesynonym
Main entry: fifth column
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fifth columnist,
a member of a fifth column. SYNONYM(S): quisling.
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Useful english dictionary. 2012.