English definition of “familiar”
EASY TO RECOGNIZE › 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 › 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.