- A person who has been thrown away or rejected.
- A person who is shipwrecked and cast ashore.
Late 16th century (as a verb): from cast + away.
- The castaway had to survive on the deserted island.
- After the shipwreck, the castaway lived off the land.
- The castaway struggled to find food and shelter.
- The castaway was rescued after being stranded for several months.
- The castaway was happy to be reunited with his family.