Definitions
1.VerbTo break apart and fall down suddenly; to cave in.
2.VerbTo cease to function due to a sudden breakdown; to fail suddenly and completely."Pyramid schemes tend to generate profits for a while and then collapse."
3.VerbTo fold compactly.
4.VerbIn a hierarchical list (such as a directory tree or table of contents), to hide the subentries of (an entry).
5.VerbTo suffer a batting collapse."Immediately after his wicket the team collapsed for 69."
6.VerbTo cause something to collapse."Hurry up and collapse the tent so we can get moving."
7.VerbTo pass out and fall to the floor or ground, as from exhaustion or other illness; to faint."The exhausted singer collapsed on stage and had to be taken to the hospital."
8.NounThe act of collapsing."She suffered a terrible collapse after slipping on the wet floor.; in a state of nervous collapse"
9.NounConstant function, one-valued function (in automata theory) (in particular application causing a reset). (Can we add an example for this sense?)
10.NounEllipsis of batting collapse.