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Noun: irruption  i'rúp-shun
  1. A sudden violent entrance; a bursting in
    "the recent irruption of bad manners"
  2. A sudden sharp increase in the relative numbers of a population
  3. A sudden violent spontaneous occurrence (usually of some undesirable condition)
    "the irruption of hostilities";
    - outbreak, eruption

Sounds like: eruptio

Derived forms: irruptions

Type of: entering, entrance, entry, happening, incoming, ingress, natural event, occurrence, occurrent, population growth

Encyclopedia: Irruption