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.

Nearby words

  1. fluid mosaic model,
  2. fluid ounce,
  3. fluid pressure,
  4. fluidextract,
  5. fluidics,
  6. fluidize,
  7. fluidized bed,
  8. fluidly,
  9. fluidrachm,
  10. fluke

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

Examples from the Web for fluidity

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