/ fəˈmɪliəli; NAmE -ərli/ adverb
1.
in a friendly and informal manner, sometimes in a way that is too informal to be pleasant :
John Hunt, familiarly known to his friends as Jack
He touched her cheek familiarly.
2.
in the way that is well known to people :
The elephant's nose or, more familiarly, trunk, is the most versatile organ in the animal kingdom.