outbreak

Noun
  1. A sudden violent spontaneous occurrence (usually of some undesirable condition) (synset 107449873)
    "the outbreak of hostilities"
    is a type of: happening, natural event, occurrence, occurrent - an event that happens
    subtypes:
    • epidemic - a widespread outbreak of an infectious disease; many people are infected at the same time
    • recrudescence - a return of something after a period of abatement
    same as: eruption, irruption

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