familiarity

noun

fa·​mil·​iar·​i·​ty fə-ˌmi-lē-ˈ(y)er-ə-tē 

-ˈ(y)a-rə-;

-ˌmil-ˈyer-, 

-ˌmil-ˈya-rə-

plural familiarities

1

a

: the quality or state of being familiar

b

: a state of close relationship : intimacy

2

a

: absence of ceremony : informality

b

: an unduly informal act or expression : impropriety

c

: a sexual liberty

3

: close acquaintance with something

Synonyms of familiarity

• intimacy
• belonging
• kinship

Examples of familiarity in a Sentence

He spoke to everyone with the easy familiarity of an old friend.

the elderly couple enjoys a familiarity that is the result of many years of happy marriage

Recent Examples on the Web

It’s helped bring a sense of familiarity as spring practice kicked off this week. —Matt Murschel, The Orlando Sentinel, 3 Apr. 2026

The new Attorney General is apt to be just as destructive as Bondi—maybe even more so, given that Bondi, who had little familiarity with the federal legal system, was not terribly effective in the job. —Ruth Marcus, New Yorker, 3 Apr. 2026

Cousins also has familiarity with new Raiders head coach Klint Kubiak. —Ryan Canfield, FOXNews.com, 2 Apr. 2026

After a debut season as shocking and raw as Aunt Lydia’s aforementioned act of discipline, Bruce Miller’s adaptation of Margaret Atwood’s landmark novel drifted into repetitious patterns with a familiarity that dulled their impact. —Ben Travers, IndieWire, 2 Apr. 2026

Word History

First Known Use

13th century, in the meaning defined at sense 1a

Rhymes for familiarity

• angularity
• bipolarity
• capillarity
• cellularity
• circularity
• granularity
• insincerity
• insularity
• modularity
• osmolarity
• popularity
• regularity

Kids Definition

familiarity

noun

fa·​mil·​iar·​i·​ty fə-ˌmil-ˈyar-ət-ē 

-ˌmil-ē-ˈar-

plural familiarities

1

: close friendship : intimacy

2

: lack of formality : freedom and ease in personal relations

3

: close acquaintance with or knowledge of something

4

: an overly bold act or expression