irruption
(noun)
noun
1. a sudden violent entrance; a bursting in
- the recent irruption of bad manners
Definition categories: act, entering, entrance, entry, incoming, ingress
2. a sudden sharp increase in the relative numbers of a population
Definition categories: process
3. a sudden violent spontaneous occurrence (usually of some undesirable condition)
Similar word(s): eruption, outbreak
Definition categories: event, happening, occurrence, occurrent