means A person who has been rejected by and cast out from their society, group, or home.

from A plain compound that does exactly what it says: 'out' plus 'cast.' It comes from Middle English 'outcasten,' to throw out — the same 'cast' as in casting a stone or casting someone aside. The image is brutally physical: not someone who quietly drifts away, but someone thrown beyond the wall. The word arrived in English partly through translations of scripture, where the outcast — the leper, the exile, the stranger at the gate — was a recurring figure.