stranger

strang·er

1. One who is neither a friend nor an acquaintance.
2. A foreigner, newcomer, or outsider.
3. One who is unaccustomed to or unacquainted with something specified; a novice: a stranger to our language; no stranger to hardship.
4. A visitor or guest.
5. Law One that is neither privy nor party to a title, act, or contract.

Origin: Middle English, from Old French estrangier, from estrange, strange; see strange .