They cursed us. Murderer they called us. They cursed us, and drove us away. And we wept, Precious, we wept to be so alone.
~ Gollum
What were you doing!? [Kovu: Nothing!] Who has made us outsiders?! [Kovu: Simba!] Who killed Scar? [Kovu: Simba!] What have I told you ABOUT THEM!?
~ Zira berating Kovu for his encounter with Kiara and Simba
An Outcast is basically another name for an exiled character or being. Unlike the Imprisoned Villain, an Outcast is banished without actually being imprisoned; sometimes, being exiled is seen as sufficient punishment in itself or they are away from civilization and society by choice. Many Outcast characters seek to return to their previous power or position; others are driven mad or embittered by it. Few, if any, embrace the state of exile.

Alternatively, an Outcast can be a tragic villain who is hated and feared by those around him/herself, forcing them into a life of relative isolation and/or wandering.

Sometimes, outcasts can be people who either got rejected by civilization and society, or they rejected civilization and society.