IRRUPTION

• (noun) a sudden violent entrance; a bursting in

  "the recent irruption of bad manners"

• (noun) a sudden violent spontaneous occurrence (usually of some undesirable condition)

  "the outbreak of hostilities"

  synonyms : eruption , outbreak

• (noun) a sudden sharp increase in the relative numbers of a population

WordNet® 3.0, © 2006 by Princeton University.

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