Verb
1. start abruptly;
"After 1989, peace broke out in the former East Bloc"2. erupt or intensify suddenly;
"Unrest erupted in the country""Tempers flared at the meeting""The crowd irrupted into a burst of patriotism"3. start to burn or burst into flames;
"Marsh gases ignited suddenly""The oily rags combusted spontaneously"4. as of teeth, for example;
"The tooth erupted and had to be extracted"5. become active and spew forth lava and rocks;
"Vesuvius erupts once in a while"6. force out or release suddenly and often violently something pent up;
"break into tears""erupt in anger"7. appear on the skin;
"A rash erupted on her arms after she had touched the exotic plant"8. become raw or open;
"He broke out in hives""My skin breaks out when I eat strawberries""Such boils tend to recrudesce"