a person who is rejected (from society or home)
suffering the misfortune of shipwreck; "shipwrecked sailors"; "castaways marooned on a desert island"
Castaway is a 1986 film starring Amanda Donohoe and Oliver Reed, and directed by Nicolas Roeg. It was adapted from the 1984 book of the same name by Lucy Irvine, telling of her experiences of staying for a year with writer Gerald Kingsland on the isolated island of Tuin, between New Guinea and Australia.
A castaway is a person who is cast adrift or ashore. While the situation usually happens after a shipwreck, some people voluntarily stay behind on a deserted island either to evade their captors or the world in general. Alternatively a person or item can be cast away, meaning rejected or discarded.