- a breaking or bursting in; a violent incursion or invasion.
- Ecology. a sudden increase in an animal population.
Origin of irruption
Examples from the Web for irruption
To this irruption succeeded an interval of peace—the calm before the storm.Leila, Complete
And there was an irruption from the house on to the terrace.A Room With A View
E. M. Forster
There has been more than one irruption into the country from the natives to the northward.The Mission; or Scenes in Africa
Captain Frederick Marryat
With angry voice the Satrap demanded the cause of this irruption.A King of Tyre
James M. Ludlow
There was no irruption of the newly-weds to complicate matters.Wanted: A Husband
Samuel Hopkins Adams
Word Origin and History for irruption
1570s, from Middle French irruption or directly from Latin irruptionem (nominative irruptio) "a breaking in, bursting in, invasion," noun of action from past participle stem of irrumpere, from assimilated form of in- "into, in, on, upon" (see in- (2)) + rumpere (see rupture (n.)). Frequently confused with eruption.
- The act or process of breaking through to a surface.