from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A sudden increase: an outbreak of influenza.
- n. A sudden eruption; an outburst: "an outbreak of strikes, violent agitation, and arrests” ( Samuel Chew).
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An eruption, sudden appearance
- n. A sudden increase.
- n. An outburst or sudden eruption, especially of violence and mischief.
- n. An uproar, riot
- n. A geological layer that breaks out
- v. To burst out
- v. To break forth
from the GNU version of the Collaborative International Dictionary of English
- n. A bursting forth; eruption; insurrection; mutiny; revolt.
- n. A sudden beginning of a violent event.
- n. A sudden occurrence or manifestation; -- usually of disease or emotion, in one person or a group.
from The Century Dictionary and Cyclopedia
- n. A breaking out; an outburst; a sudden and violent manifestation: as, an outbreak of fever; an outbreak of popular indignation.
- n. A rupture of the peace; a public disturbance or riot.
- To break or burst forth.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a sudden violent spontaneous occurrence (usually of some undesirable condition)
From Middle English *utbreken, from Old English ūtābrecan ("to break out"), equivalent to out- + break. Cognate with Dutch uitbreken ("to break out, burst out"), German ausbrechen ("to break out, erupt"). (Wiktionary)