[cptbutton]

In Steven Brust's Dragaera books, Sethra Lavode mentions that being a god is just a job you can achieve (she turned down a chance). To be a god you must be able to manifest in multiple places at once, and be impossible to bind or control.

If you can manifest in multiple places at once, but can be bound or controlled, you are merely a demon.

Note that these are necessary traits, but probably not sufficient.