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 formsnon·flu·id·i·ty, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for fluidity


Examples from the Web for fluidity

Contemporary Examples of fluidity

Historical Examples of fluidity

  • 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

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

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