Pronunciation: (blō'out"),[key] —n. 1. a sudden bursting or rupture of an automobile tire.
2. a sudden or violent escape of air, steam, or the like.
3. a hollow formed in a region of shifting sands or light soil by the action of the wind.
4. an uncontrollable escape of oil, gas, or water from a well.
6. Slang.a lavish party or entertainment.