English

Definition of infiltrate verb from the Oxford Advanced Learner's Dictionary

     

    infiltrate

     verb
    verb
    BrE BrE//ˈɪnfɪltreɪt//
     
    ; NAmE NAmE//ˈɪnfɪltreɪt//
     
    Verb Forms present simple I / you / we / they infiltrate
    BrE BrE//ˈɪnfɪltreɪt//
     
    ; NAmE NAmE//ˈɪnfɪltreɪt//
     
    he / she / it infiltrates
    BrE BrE//ˈɪnfɪltreɪts//
     
    ; NAmE NAmE//ˈɪnfɪltreɪts//
     
    past simple infiltrated
    BrE BrE//ˈɪnfɪltreɪtɪd//
     
    ; NAmE NAmE//ˈɪnfɪltreɪtɪd//
     
    past participle infiltrated
    BrE BrE//ˈɪnfɪltreɪtɪd//
     
    ; NAmE NAmE//ˈɪnfɪltreɪtɪd//
     
    -ing form infiltrating
    BrE BrE//ˈɪnfɪltreɪtɪŋ//
     
    ; NAmE NAmE//ˈɪnfɪltreɪtɪŋ//
     
    Terrorism
     
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  1. 1[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. See related entries: Terrorism
  2. 2[intransitive, transitive] infiltrate (into) something (specialist) (especially of liquids or gases) to pass slowly into something Only a small amount of the rainwater actually infiltrates into the soil.
  3. Word Origin Middle English (as infiltration): from in- + filtrate.
See the Oxford Advanced American Dictionary entry: infiltrate