A person whom one does not know; a person who is neither a friend nor an acquaintance.
An outsider or foreigner.
One not admitted to communion or fellowship.
A newcomer.
(humorous) One who has not been seen for a long time.
(law) One not privy or party to an act, contract, or title; a mere intruder or intermeddler; one who interferes without right.
comparative form of strange: more strange