stranger

noun

• a person whom one does not know or with whom one is not familiar:don’t talk to strangers she remained a stranger to him
• a person who does not know, or is not known in, a particular place or community:I’m a stranger in these parts he must have been a stranger to the village
• (stranger to) a person entirely unaccustomed to (a feeling, experience, or situation):he is no stranger to controversy
• a person who is not a member or official of the House of Commons.