fluidity

American  

[floo-id-i-tee] / fluˈɪd ɪ ti /

noun

• fluidities
  plural

1. the quality or state of being fluid.

2. Physics.

   1. the ability of a substance to flow.

   2. a measure of this ability, the reciprocal of the coefficient of viscosity.

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fluidity British  

/ fluːˈɪdɪtɪ /

noun

1. the state of being fluid

2. physics the reciprocal of viscosity

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Other Word Forms

Derived Forms

• nonfluidity
  noun

Inflected Forms

Nouns

• fluidities
  plural

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Etymology

Origin of fluidity

First recorded in 1595–1605; fluid + -ity

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Explanation

Fluidity is a quality of being graceful or flowing, like the fluidity of a dancer's movements. Things that move with easy, smooth motions have fluidity — think of clouds moving across the sky on a windy day, or the way a modern dancer's body moves. This adjective can also mean "changeable," like the fluidity of ideas being exchanged during a high school debate class. As a physical quality, you might also describe the fluidity of any substance that's fluid, or behaves like a liquid.

Example Sentences

See Examples For:

fluidity fluidities

Training focused more on learning to move in new ways, and doing fight scenes with greater fluidity, Cena said.

From Barron's ● Oct. 8, 2026

The melody lines of the bass in R.E.M. songs are singularly melodic and distinctive, with a fluidity that makes them seem simple when they are not.

From Salon ● Oct. 7, 2026

It is important to realize the fluidity of the region now: These new conjunctions are flexible and overlapping.

From The Wall Street Journal ● Oct. 4, 2026

But it was the fluidity of London City's link-up play that caught the eye - a group of superstars looking like a good team in the first game of the season.

From BBC ● Sep. 4, 2026

A vast seething, hot world of fluidity, and Rine the rascal was at home.

From "Invisible Man" by Ralph Ellison

Gerwig’s “Little Women” leans into the book’s fluidities and contradictions, especially among the characters themselves, who are self-sacrificing and ethereal one moment and graspingly materialistic the next.

From Washington Post ● Dec. 18, 2019

His hands pass over the keys and he produces Chopin-like fluidities.

From Confessions of a Young Man by George (George Augustus) Moore

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