Longman Dictionary of Contemporary English homepage

intrusion

noun
     
in‧tru‧sion [uncountable and countable]
1 when someone does something or something happens that affects your private life or activities in an unwanted way
intrusion into/on/upon
I resented this intrusion into my domestic affairs.
the unwelcome intrusion of the press
2 when something comes into a place or situation and has an unwanted effect:
the intrusion of badly designed new buildings in the historic high street

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