- irruption - a sudden violent entrance; a bursting in; "the recent irruption of bad manners"
--1 is a kind of entrance, entering, entry, ingress, incoming
Derived form: verb irrupt1 - irruption - a sudden sharp increase in the relative numbers of a population
--2 is a kind of population growth
- outbreak, eruption, irruption - a sudden violent spontaneous occurrence (usually of some undesirable condition); "the outbreak of hostilities"
--3 is a kind of happening, occurrence, natural event
--3 has particulars: epidemic; recrudescenceDerived form: verb irrupt2 - outbreak, eruption, irruption - a sudden violent spontaneous occurrence (usually of some undesirable condition); "the outbreak of hostilities"