Closure

Closure is the process by which a literary work is either brought to a logical conclusion or structured in such a way that the reader feels it is complete and coherent.
One could also look at this normally easy word as drawing together of edges, parts or ideas to form a united whole.

An example of bad closure could be "The Yellow Wallpaper". The ending lead me very confused on what happened to the narrator.
It also ended with a line that keeps you on the edge waiting for more information to help close the story. "Now why should that man have fainted? But he did, and right across my path by the wall, so that I had to creep over him every time!"
One just has to guess that she stayed in the house permanently or what not? I am not entirely sure which proves that this short story did not have closure.