| noun | an abrupt failure of function or complete physical exhaustion “the commander's prostration demoralized his men” |
| noun | a natural event caused by something suddenly falling down or caving in “the roof is in danger of collapse” |
| noun | the act of throwing yourself down “he landed on the bed with a great flop” |
| noun | a sudden large decline of business or the prices of stocks (especially one that causes additional failures) |
| verb | break down, literally or metaphorically “The wall collapsed” |
| verb | collapse due to fatigue, an illness, or a sudden attack |
| verb | fold or close up “fold up your umbrella” |
| verb | fall apart “the building crumbled after the explosion” |
| verb | cause to burst “The ice broke the pipe” |
| verb | suffer a nervous breakdown |
| verb | lose significance, effectiveness, or value “The school system is collapsing” |
| collapse | verb | suffer a nervous breakdown |
| floppy | adjective | hanging limply |
| flop | verb | fall loosely |
| crash | verb | undergo a sudden and severe downturn |
| collapse | noun | a sudden large decline of business or the prices of stocks (especially one that causes additional failures) |
| cave in | noun | the sudden collapse of something into a hollow beneath it |
| breakdown | noun | a mental or physical breakdown |
| collapsible | adjective | capable of collapsing or being collapsed |
| crack-up | noun | a mental or physical breakdown |