Akademik

stranger
noun /ˈstreɪndʒər/
a) A person whom one does not know; a person who is neither a friend nor an acquaintance.
b) An outsider or foreigner
Syn: alien, foreigner, foreign national, non-national, nonnational, non-resident, nonresident, outsider, newbie, newcomer
Ant: acquaintance, friend, compatriot, coutryman, fellow, citizen, countryman, national, one of us, resident

Wikipedia foundation.