outburstPronunciation: /ˈaʊtbəːst/Translate outburst | into French | into German | into Italian | into Spanish Definition of outburst noun a sudden release of strong emotion:an angry outburst from the prime minister a sudden occurrence of a particular activity:a wild outburst of applause Physics a sudden emission of energy or particles:a very dramatic outburst of neutronsoutburst in other Oxford dictionaries Definition of outburst in the US English dictionary