irruption

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noun ir·rup·tion \ i-ˈrəp-shən \
Updated on: 11 Sep 2017

Definition of irruption

plural irruptions
:an act or instance of irrupting: such as
a :a sudden, violent, or forcible entry :a rushing or bursting in
  • …the assassination still feels like a primal catastrophe—an irruption of inexplicable evil as horrifying as any supernatural bogeyman.
  • —Ross Douthat
b :a sudden and violent invasion
  • …begins not with Hitler's attack on Poland, but with the Japanese irruption into Outer Mongolia in July 1939…
  • —John Gooch
c ecology :a sudden sharp increase in the relative numbers of a natural population usually associated with favorable alteration of the environment
  • The owl's appearance came during an irruption, a huge southward migration of snowy owls from their arctic territories that, this year, followed a successful breeding period.
  • —Scott Carroll

First Known Use of irruption

circa 1540


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