A shipwrecked sailor.
Robinson Crusoe was a famous fictional castaway.
A discarded person or thing.
This old coat was a castaway in someone's trash.
An outcast; someone cast out of a group or society.
These homeless people are society's castaways.
Cast adrift or ashore; marooned.
After the mutiny, the castaway ship's officers suffered a month at sea in the lifeboat.
Shipwrecked.
The storm left them castaway on an uninhabited island.
Cast out; rejected or excluded from a group.