outbreak /(?)/

out·break

outbreak

n.
  1. A bursting forth; eruption; insurrection; mutiny; revolt.
    The flash and outbreak of a fiery mind.
  2. A sudden beginning of a violent event; as, the outbreak of hostilities between ethnic groups.
  3. A sudden occurrence or manifestation; -- usually of disease or emotion, in one person or a group; as, an outbreak of measles among the students; he had an outbreak of shingles; an outbreak of nervousness in the mob.