definition of
collapse

[1] #1 collapse v. [fall in, cave in, give, give way, break, founder] break down, literally or metaphorically; "The wall collapsed"; "The business collapsed"; "The dam broke"; "The roof collapsed"; "The wall gave in"; "The roof finally gave under the weight of the ice". wn

[2] #2 collapse v. [break down] collapse due to fatigue, an illness, or a sudden attack. wn

[3] #3 collapse n. [prostration] an abrupt failure of function or complete physical exhaustion; "the commander's prostration demoralized his men". wn

[4] #4 collapse n. a natural event caused by something suddenly falling down or caving in; "the roof is in danger of collapse"; "the collapse of the old star under its own gravity". wn

[5] #5 collapse n. [flop] the act of throwing yourself down; "he landed on the bed with a great flop". wn