castaway

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.

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.