fa ‧ mil ‧ i ‧ ar ‧ i ‧ ty /fəˌmɪliˈærəti, fəˌmɪliˈærɪti/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ familiarity ≠ ↑ unfamiliarity , ↑ family , ↑ familiarization ; adjective : ↑ familiar ≠ ↑ unfamiliar , ↑ familial ; verb : ↑ familiarize ; adverb : ↑ familiarly ]
1 . a good knowledge of a particular subject or place
familiarity with
In fact his familiarity with the Bronx was pretty limited.
2 . the quality of being well-known to you:
I miss the familiarity of home.
3 . a relaxed way of speaking to someone or behaving with someone:
He treated her with the easy familiarity of an equal.
4 . familiarity breeds contempt an expression meaning that if you know someone too well, you find out their faults and respect them less