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

But there’s more to a good punch than the fluidity of its movement or inertia. —Christopher Cruz, Rolling Stone, 10 July 2025

Suddenly, tampon dispensers appeared in boys’ bathrooms and school libraries and classes featured books about gender fluidity. —Brenda Lebsack, Oc Register, 8 July 2025

Virgin is incredibly personal, with Lorde covering everything from a breakup to gender fluidity in these 11 songs. —Hannah Dailey, Billboard, 8 July 2025

But the underlying rails that power payments haven’t kept pace with the fluidity of today’s digital marketplaces. —Paul Marcantonio, Forbes.com, 2 July 2025

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