› ECONOMICS a sudden serious fall in the value of something, for example, of shares or of a particular area of business: A crash in China could also affect the global economy if the country's demand for imports and raw materials drops sharply. They had lost all their money in the Wall Street Crash of 1929. The stock market crash has had a major impact, with many investors still nursing big losses.crash in sth The crash in the property market has led to many houses being repossessed by mortgage companies. → See Note recession
› IT a sudden failure of a computer or system: Wednesday's state computer crash created far more problems than officials first realized.