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English definition of “break out”

break out

(START) phrasal verb with break     /breɪk/ verb (broke, broken)
B2 If something dangerous or unpleasant breaks out, it suddenly starts : War broke out in 1914. Fighting has broken out all over the city .Starting and beginningStarting again break out in a rash/spots/sweat to suddenly have spots or sweat appear on your skin : She broke out in a rash after eating some strawberries . It didn't take much exercise to make him break out in (a) sweat . When I heard the noise I broke out in a cold sweat .Being and falling ill
(Definition of break out (START) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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