[fuh-mil-ee-ar-i-tee, -mil-yar-]

noun, plural fa·mil·i·ar·i·ties.

thorough knowledge or mastery of a thing, subject, etc.
the state of being familiar; friendly relationship; close acquaintance; intimacy.
an absence of ceremony and formality; informality.
freedom of behavior justified only by the closest relationship; undue intimacy.
Often familiarities. an instance of such freedom, as in action or speech.
a sexual liberty or impropriety.

Origin of familiarity

1350–1400; Middle English familiarite (< Anglo-French) < Latin familiāritās intimacy. See familiar, -ity
Related formso·ver·fa·mil·i·ar·i·ty, nounpre·fa·mil·i·ar·i·ty, noun

Synonyms for familiarity

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for over-familiarity

Historical Examples of over-familiarity

  • To do that I must keep up my position, and over-familiarity would be the destruction of it.'

    Robbery Under Arms

    Thomas Alexander Browne, AKA Rolf Boldrewood

  • Never presume to cultivate an over-familiarity of manner, which is always offensive; rather be reserved—even to your best friends.

British Dictionary definitions for over-familiarity


noun plural -ties

reasonable knowledge or acquaintance, as with a subject or place
close acquaintanceship or intimacy
undue intimacy
(sometimes plural) an instance of unwarranted intimacy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for over-familiarity



c.1200, from Old French familiarite and directly from Latin familiaritatem (nominative familiaritas) "intimacy, friendship," from familiaris "friendly, intimate" (see familiar). Meaning "undue intimacy" is from late 14c. That of "close acquaintance" is from c.1600.

Online Etymology Dictionary, © 2010 Douglas Harper