<p><strong>Noun:</strong></p><ul><li>a sudden breaking, break out, or occurrence, especially of something bad or unpleasant; eruption: the outbreak of war.</li><li>a sudden and active manifestation: an outbreak of hives.</li><li>a sudden increase in the incidence of a disease or medical condition in a particular place or population: a worldwide polio outbreak in the early 1900s.</li><li>an outburst: an outbreak of temper.</li><li>an insurrection, revolt, or mutiny.</li><li>a public disturbance; riot.</li></ul>