Instance

An instance is a case or occurrence of anything or an example put forth in proof or illustration. In object oriented programming this refers to an object that has been instantiated and now exists. In Game Maker it refers to an object that has been placed in a room. However, it should be noted that the room editor is only a preview of the instantiated objects. They are not instantiated until the game runs, similar to other programming languages, where the program would have to be run.