Definition of intrusion noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ɪnˈtruːʒn//
    ; NAmE NAmE//ɪnˈtruːʒn//
    [uncountable, countable]
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  1. 1something that affects a situation or people’s lives in a way that they do not want intrusion (on/upon something) They claim the noise from the new airport is an intrusion on their lives. intrusion (into something) This was another example of press intrusion into the affairs of the royals.
  2. 2intrusion (into/on/upon something) (formal) the act of entering a place which is private or where you may not be wanted She apologized for the intrusion but said she had an urgent message.
  3. Word Originlate Middle English (in the sense ‘invasion, usurpation’): from medieval Latin intrusio(n-), from Latin intrudere ‘thrust in’, from in- ‘into’ + trudere ‘to thrust’.Extra examples He leapt back in shock at this sudden intrusion. I really resented his intrusion in a family matter. This is a governmental intrusion on the freedom of the press. an unwarranted intrusion upon the singer’s privacy media intrusion into the lives of celebrities They claim the noise from the airport is an intrusion on their lives.
See the Oxford Advanced American Dictionary entry: intrusion