What is Collapse ?
Collapse is (noun) 1. a sudden fall The collapse of the old wall buried two workmen. 2. a sudden fall in price the collapse of the dollar on the foreign exchange markets 3. the sudden failure of a company Investors lost thousands of pounds in the collapse of the bank.(verb) 1. to fall down suddenly The roof collapsed under the weight of the snow. 2. to fail suddenly The company collapsed with £25,000 in debts. 3. to fall down unconscious He collapsed after the marathon.
source: Easier English, Student Dictionary Upper Intermediate Level