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[floo-id-i-tee] /fluˈɪd ɪ ti/
the quality or state of being fluid.
  1. the ability of a substance to flow.
  2. a measure of this ability, the reciprocal of the coefficient of viscosity.
    Compare rhe.
Origin of fluidity
First recorded in 1595-1605; fluid + -ity
Related forms
nonfluidity, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for fluidity
Contemporary Examples
Historical Examples
  • With obliterating unconcern, she reduced them to the fluidity of the inchoate.

    The Paliser case Edgar Saltus
  • The fluidity is increased by starting from a cotton which has been previously mercerised.

  • These motor boys and girls have what I may characterize as fluidity of the attention.

    The Story of the Mind James Mark Baldwin
  • Its fluidity at the best is very imperfect, and its motion is very slow.

    Rollo in Naples Jacob Abbott
  • Only on this condition can he get used to the fluid's fluidity.

    Creative Evolution Henri Bergson
  • Let us take a liquid; is its fluidity the necessary quality?

British Dictionary definitions for fluidity


the state of being fluid
(physics) the reciprocal of viscosity
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for fluidity

c.1600, from French fluidité, from fluide (see fluid (adj.)), or else formed in English from fluid.

Online Etymology Dictionary, © 2010 Douglas Harper
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