infiltrator

Other forms: infiltrators

Definitions of infiltrator
  1. noun
    someone who takes up a position surreptitiously for the purpose of espionage
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    type of:
    spy, undercover agent
    (military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors
  2. noun
    an intruder (as troops) with hostile intent
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    type of:
    interloper, intruder, trespasser
    someone who intrudes on the privacy or property of another without permission
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