Bedeutung von “stranger” — Learner’s Dictionary

stranger

noun [ C ] us uk /ˈstreɪndʒər/

B1 someone you have never met before:

I can't just walk up to a complete stranger and start speaking to them.
be no stranger to sth

to have a lot of experience of something:

He's no stranger to hard work himself.

(Definition von “stranger” aus dem Cambridge Learner's Dictionary © Cambridge University Press)