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English definition of “intrusion”

intrusion

noun [C or U] uk   /ɪnˈtruː.ʒən/ us  
C2 an occasion when someone goes into a place or situation where they are not wanted or expected to be: They complained about excessive government intrusion (= unwanted involvement) into their legitimate activities. His phone call was a welcome intrusion into an otherwise tedious morning.
(Definition of intrusion from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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