Definition of "double-agent" [double-agent]

• Attributive form of double agent (noun)

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• "He is also believed to be responsible for training the Jordanian double-agent - Humam Muhammad Abu Mulal al-Balawi - whose suicide mission in December 2009 at a base in eastern Afghan province of Khost killed seven CIA agents."
• "It was the end of season 3, and she ended up betraying Ben by telling Jack she was a double-agent, allowing the castaways to set their trap."
• "It's about political officer and double-agent Max Nikomedes, embroiled in the battle between the departments of Political Education and Intelligence on Jerusalem, a terraformed Christian planet."