n.
Function: noun
Date: 1801
1 a : a breakdown in vital energy, strength, or stamina b : a state of extreme prostration and physical depression (as from circulatory failure or great loss of body fluids) c : an airless state of all or part of a lung originating spontaneously or induced surgically
2 : the act or action of collapsing <the cutting of many tent ropes, the collapse of the canvas ― Rudyard Kipling>
3 : a sudden failure : BREAKDOWN , RUIN
4 : a sudden loss of force, value, or effect <the collapse of respect for ancient law and custom ― L. S. B. Leakey>