Share WhatsApp Facebook Twitter Pinterest Email Outbreak Definition: The definition of an outbreak is a sudden increase, outburst or riot. Synonyms: Commotion, Tumult, Insurrection, Outburst Antonyms: Order, Quiet, Subsidence, Peace 0 Related Posts Abandon – Definition, Synonyms and Antonym December 26, 2021 Abash – Definition, Synonyms and Antonym December 26, 2021 Abbreviate – Definition, Synonyms and Antonym December 26, 2021 Write A Comment Cancel Reply Save my name, email, and website in this browser for the next time I comment. Δ