a substance, as a liquid or gas, that is capable of flowing and that changes its shape at a steady rate when acted upon by a force tending to change its shape.
pertaining to a substance that easily changes its shape; capable of flowing.
consisting of or pertaining to fluids.
changing readily; shifting; not fixed, stable, or rigid: fluid movements.
convertible into cash: fluid assets.
- flu·id·al, adjective
- flu·id·ly, flu·id·al·ly, adverb
- flu·id·ness, noun
- non·flu·id, noun
- non·flu·id·ly, adverb
- un·flu·id, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use fluid in a sentence
Their SSD is made from a piece of fabric into which tiny, fluid-filled tubes have been sewn.This artificial skin feels ‘ghosts’ — things you wish were there | Stephen Ornes | November 20, 2020 | Science News For Students
As the pressure decreased, the water transitioned from a high-density to low-density fluid before crystallizing into ice.Supercooled water has been caught morphing between two forms | Emily Conover | November 19, 2020 | Science News
We also saw high rates of a fluid buildup in a sac around the heart.Teen athletes with even mild COVID-19 can develop heart problems | Partho Sengupta | November 18, 2020 | Science News For Students
At the time, Noelle had just come out to her mother as sexually fluid and thankfully, her mom was fully supportive.Cynthia Bailey Celebrates Her Daughter Noelle’s 21st Birthday | Steven Psyllos | November 11, 2020 | Essence.com
It’s as easy to glimpse pixels as waves in his fluid color-scapes.In the galleries: Referencing the revered Washington colorists and beyond | Mark Jenkins | November 6, 2020 | Washington Post
He speaks in heavily-accented English, but fluidly and lyrically, with both force and deliberation.The Politics of Literature: An interview with Nobel laureate Mario Vargas Llosa | Michael Moynihan | October 10, 2013 | THE DAILY BEAST
Some resemble insects, while others look like crustaceans, amphibians, and sharks and move fluidly.Guillermo del Toro’s ‘Pacific Rim’ Is a Total Blast | Marlow Stern | July 9, 2013 | THE DAILY BEAST
Flipboard: Not many apps do personalized news aggregation as fluidly and beautifully as Flipboard.Must-Have Apps: What To Download On Your New Device | Nina Strochlic | December 25, 2012 | THE DAILY BEAST
“I appreciate the fact that a man built like a yeti can move so fluidly,” said Stewart.Jon Stewart and Bill O’Reilly ‘Rumble’ Debate: Best Moments (Video) | Nina Strochlic | October 7, 2012 | THE DAILY BEAST
They can only make sure that that financial system functions fluidly.
I noted with interest how accurately this motion kept pace with our own speed, and how fluidly the walls seemed to run together.The Metal Monster | A. Merritt
Then, as fluidly as he had melted into the woods, McNeil returned.The Time Traders | Andre Norton
British Dictionary definitions for fluid
a substance, such as a liquid or gas, that can flow, has no fixed shape, and offers little resistance to an external stress
capable of flowing and easily changing shape
of, concerned with, or using a fluid or fluids
constantly changing or apt to change
smooth in shape or movement; flowing
- fluidal, adjective
- fluidness, noun
- fluidly or fluidally, adverb
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
Scientific definitions for fluid
A state of matter, such as liquid or gas, in which the component particles (generally molecules) can move past one another. Fluids flow easily and conform to the shape of their containers. See also state of matter viscosity.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.