infiltrate verb definition in Terrorism topic from the Oxford Advanced Learner's Dictionary

infiltrate

 verb: Terrorism topic
[transitive, intransitive] to enter or make somebody enter a place or an organization secretly, especially in order to get information that can be used against it infiltrate something The headquarters had been infiltrated by enemy spies. infiltrate somebody into something Rebel forces were infiltrated into the country. infiltrate into something The CIA agents successfully infiltrated into the terrorist organizations.

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