outbreak

Definition of Outbreak in English :

1. eruption, irruption, outbreak

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

Example Sentences:
'the outbreak of hostilities'

WordNet Lexical Database for English. Princeton University. 2010.

Outbreak

noun

a sudden, violent, or spontaneous occurrence, esp of disease or strife

noun

1.

a breaking out; sudden occurrence, as of disease or war

2.

an insurrection or riot

n.

1. A sudden increase: an outbreak of influenza.

2. A sudden eruption; an outburst: "an outbreak of strikes, violent agitation, and arrests" (Samuel Chew).