definition of
familiarity

[1] #1 familiarity n. [acquaintance, conversance, conversancy] personal knowledge or information about someone or something. wn

[2] #2 familiarity n. usualness by virtue of being familiar or well known. wn

[3] #3 familiarity n. [intimacy, closeness] close or warm friendship; "the absence of fences created a mysterious intimacy in which no one knew privacy". wn

[4] #4 familiarity n. [casualness] a casual manner. wn

[5] #5 familiarity n. [impropriety, indecorum, liberty] an act of undue intimacy. wn