outbreak
US /ˈaʊtˌbrek/
・UK /ˈaʊtbreɪk/
B2
noun
- Sudden occurrence of illness, discontent etc.
- A sudden occurrence of something unwelcome, such as war or disease.
- A sudden bursting forth; eruption.
- A sudden manifestation or eruption.
- A sudden start or increase of fighting or other violence.
Examples
the events that led to the outbreak of World War I
A new outbreak of smallpox occurred in 1928.