fluidity

noun

flu·​id·​i·​ty flü-ˈi-də-tē 

1

: the quality or state of being fluid

2

: the physical property of a substance that enables it to flow

Examples of fluidity in a Sentence

Recent Examples on the Web

Hilton needs to take a Chicano studies class, where discussions about the fluidity of Mexican identity inevitably come up. — Los Angeles Times, 7 Oct. 2026

Ultra-human characters, swift pacing, fluidity of action, a casual yet precise plotline, and sharp dialogue are centerpieces of Fair Ones, Lydia Millet’s new double novel. — Literary Hub, 6 Oct. 2026

Meanwhile, independent journalists are developing direct relationships with advertisers and marketers, creating more fluidity between the editorial and business sides of their brands. — Max Tani, semafor.com, 5 Oct. 2026

Hayes has regularly scheduled the senior and U-23 camps to run concurrently in hopes of extending the growing fluidity between their rosters. — Melanie Anzidei, New York Times, 4 Oct. 2026

Word History

First Known Use

1603, in the meaning defined at sense 1

Rhymes for fluidity

• acidity
• aridity
• avidity
• cupidity
• humidity
• liquidity
• lucidity
• morbidity
• placidity
• rancidity
• rapidity
• rigidity

Kids Definition

fluidity

noun

flu·​id·​i·​ty flü-ˈid-ət-ē 

: the quality or state of being fluid

Medical Definition

fluidity

noun

flu·​id·​i·​ty flü-ˈid-ət-ē 

plural fluidities

1

: the quality or state of being fluid

2

a

: the physical property of a substance that enables it to flow

b

: the reciprocal of viscosity