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.

[Middle English, from Old French estrangier, from estrange, strange. See strange.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.