Meaning of “familiar” - Learner’s Dictionary

familiar

adjective uk us /fəˈmɪliər/
EASY TO RECOGNIZE

B1 easy to recognize because of being seen, met, heard, etc before:

It's nice to see a few familiar faces (= people that I recognize) around here.
This street doesn't look familiar to me.
be familiar with sth

B2 to know about something or have experienced it many times before:

Anyone who's familiar with his poetry will find the course easy.
→ Opposite unfamiliar
FRIENDLY

friendly and very informal:

He doesn't like to be too familiar with his staff.

(Definition of “familiar” from the Cambridge Learner’s Dictionary © Cambridge University Press)