What Is An Outsider?

To me, an outsider is someone that doesn't fit in to what the majority of people say is "normal". An example of an outsider is Charlie in The Perks of Being A Wallflower. He doesn't fit in with the rest of the kids his age, and he's always on the outside. He sits back and watches while other people do things. This is the same for the greasers in The Outsiders, because they don't fit in with the rest of the teenagers, the Socs.