0 If something dangerous or unpleasant breaks out, it suddenly starts: --
3 to suddenly begin to have a rash (= spots on the skin): --
An argument broke out and in the ensuing fight, a gun went off.
Fighting broke out in the stands five minutes before the end of the match.
The ambassador was recalled when war broke out.
There's a sense of foreboding in the capital, as if fighting might at any minute break out.
I break out in a cold sweat just thinking about public speaking.