Word parts

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familiar + -ity

Pronunciation

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Singular
familiarity

Plural
familiarities

  1. (uncountable) Your familiarity with something or someone is how well you know it or them.
    Her familiarity with the city made her an excellent tour guide.
    You should have a good familiarity with the night sky.
  2. (uncountable) Familiarity is when people are very friendly or too close.
    Sometimes, too much familiarity can make coworkers uncomfortable.
  3. (countable) An instance of familiar behavior.
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