/ Dictionary / Index O outbreak: Meaning and Definition of Find definitions for: out•break Pronunciation: (out'brāk"), [key] — n. a sudden breaking out or occurrence; eruption: the outbreak of war. a sudden and active manifestation: an outbreak of hives. an outburst: an outbreak of temper. an insurrection, revolt, or mutiny. a public disturbance; riot. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: outbreak (Thesaurus) outbrave outbreed Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language