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

Belgium, meanwhile, arrives in red-hot form after a dominant 5–2 win over the United States, showcasing their attacking depth and fluidity. —Ben Verbrugge, MSNBC Newsweek, 1 Apr. 2026

The demonstration highlighted the robot’s walking stability, joint coordination, and overall movement fluidity rather than industrial task performance. —Atharva Gosavi, Interesting Engineering, 30 Mar. 2026

Plus, the fluidity of the situation is completely unnerving. —Jim Cramer, CNBC, 29 Mar. 2026

To Trump, fluidity and inconsistency are virtues, not bugs. —Jeffrey Sonnenfeld, Fortune, 26 Mar. 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