fluid

adjective
flu·id | \ ˈflü-əd \

Definition of fluid 

(Entry 1 of 2)

1a : having particles that easily move and change their relative position without a separation of the mass and that easily yield to pressure : capable of flowing a long screw that forces the fluid chocolate through fine openingsTechnical Survey

b : subject to change or movement boundaries became fluid

2 : characterized by or employing a smooth easy style the ballerina's fluid movements fluid recitation of his lines

3a : available for various uses a fluid computer program

b : liquid sense 4 fluid assets

fluid

noun

Definition of fluid (Entry 2 of 2)

: a substance (such as a liquid or gas) tending to flow or conform to the outline of its container

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Other words from fluid

Adjective

fluidly adverb
fluidness noun

Noun

fluidal \ˈflü-ə-dᵊl \ adjective
fluidally \ˈflü-ə-dᵊl-ē \ adverb
fluidlike \ˈflü-ə-dᵊl-ˌlīk \ adjective

Examples of fluid in a Sentence

Adjective

a substance in a fluid state warm the jam until it is fluid, then spread it over the cake

Noun

Please check the fluids in the car's engine. She needs to drink plenty of fluids. Fluid leaked from the car's engine. a bottle of yellow fluid
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Recent Examples on the Web: Adjective

Everything farther down acts like a solid body but remains fluid all the way to the planet’s mysterious core. Lee Billings, Scientific American, "Juno Peers Deep into Jupiter's Abyss to Reveal Weird Winds," 7 Mar. 2018 Finally, in 2013, Goff landed in an emergency room, nearly suffocating from fluid in her lungs. Claire Altschuler, chicagotribune.com, "Racing against cancer: New efforts to save lives with early detection," 21 May 2018 Madenjian is the perfect foil for Shrek's character as the physically fluid, funny, and expressive Donkey. Denise Coffey, Courant Community, "Woodstock Academy To Present "Shrek: The Musical"," 9 May 2018 Thursday at the Boston Opera House, Sergey Antonov was again the opening-night on-stage cellist, fluid and intense in the Prelude to No. 1 (to which there is no dancing). Jeffrey Gantz, BostonGlobe.com, "Boston Ballet opens with high-octane ‘Parts in Suite’," 11 Mar. 2018 But that’s not necessarily a bad thing — the definition of Americana has always been fluid. refinery29.com, "What Americana Means (And Doesn't) In 2018: From Childish Gambino To Roseanne," 3 July 2018 The timeline is fluid but the former president is expected to start making an impact in September, according to two sources familiar with his team's plan. James Hohmann, Washington Post, "The Daily 202: Five times Anthony Kennedy was the fifth vote shows the significance of his retirement," 28 June 2018 Concededly, some jurists employ a more structured (some might say rigid) framework for deciding cases that feature conflict between valuable principles; Justice Kennedy’s decision-making process is more fluid. Nancy L. Combs, Vox, "An optimist and yet a realist: a former clerk to Justice Kennedy considers his legacy," 30 June 2018 For decades prior, the southwestern borderlands had prospered under a more fluid, humane and practical definition of boundaries, driven in large part by the wants and needs of the blended, binational border communities. Time Staff, Time, "The 25 Moments From American History That Matter Right Now," 28 June 2018

Recent Examples on the Web: Noun

The mattress was covered with blood and body fluids. Carol Marbin Miller, miamiherald, "A painful reunion at school of horror," 11 July 2018 At the end of 2017, Bouchet and Eric Woillez, also at ENS, sketched out their own theoretical account of how two-dimensional fluid flow can describe a rotating system such as the atmosphere of a planet. Joshua Sokol, WIRED, "Flattened Fluids Help Scientists Understand Oceans and Atmospheres," 7 July 2018 The disease-causing prion is found in many tissues and fluids of infected animals, including saliva, brain, lymph and muscle. Paul A. Smith, Milwaukee Journal Sentinel, "Baiting and feeding bans initiated due to CWD-positive deer farm in Marinette County," 6 July 2018 Natural lube Blood is a bodily fluid ulike anything else that comes out of our genitals, peeps. Arielle Egozi, Harper's BAZAAR, "4 Reasons Why Period Sex is Actually the Best Sex," 6 July 2018 Executive Director Rita McMahon said the snowy owl—named Lorax, after the eco-friendly character in the Dr. Seuss book and film—had parasites and a small sore on her foot but was recuperating with fluids and a diet of mice. Katie Honan, WSJ, "Snowy Owl Makes Unexpected Visit at New York City Jail," 4 July 2018 The hospital started patients on antibiotics and fluids immediately after a sepsis diagnosis — and death rates plummeted. Karen Weintraub, STAT, "Sepsis is the third leading cause of death. Can a new blood test change that?," 3 July 2018 The doctor can talk to you about your child's fluid intake, bowel and bladder habits and family history. Mary Caldwell, ajc, "7 ways to bed-wetting to rest for your child," 2 July 2018 Moncada muffed Jake Cave’s grounder in the second inning but then made a diving backhanded stop on Eduardo Escobar’s sharp grounder in the sixth and, in one fluid motion, wheeled around on one knee to throw to first base. Phil Thompson, chicagotribune.com, "Yoan Moncada asked to learn error of his ways — and he's not the only one," 29 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fluid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of fluid

Adjective

1603, in the meaning defined at sense 1a

Noun

1661, in the meaning defined above

History and Etymology for fluid

Adjective

French or Latin; French fluide, from Latin fluidus, from fluere to flow; akin to Greek phlyzein to boil over

Noun

see fluid entry 1

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Statistics for fluid

Last Updated

21 Sep 2018

Look-up Popularity

Time Traveler for fluid

The first known use of fluid was in 1603

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More Definitions for fluid

fluid

adjective

English Language Learners Definition of fluid

 (Entry 1 of 2)

: capable of flowing freely like water

—used to describe something that can change easily or that changes often

: having or showing a smooth and easy style

fluid

noun

English Language Learners Definition of fluid (Entry 2 of 2)

: a substance that is able to flow freely : a liquid substance

fluid

adjective
flu·id | \ ˈflü-əd \

Kids Definition of fluid

 (Entry 1 of 2)

1 : capable of flowing like a liquid or gas fluid lava

2 : having a graceful or flowing style or appearance a dancer's fluid movement

Other words from fluid

fluidly adverb

fluid

noun

Kids Definition of fluid (Entry 2 of 2)

: something that tends to flow and take the shape of its container

fluid

adjective
flu·id | \ ˈflü-əd \

Medical Definition of fluid 

(Entry 1 of 2)

: having particles that easily move and change their relative position without a separation of the mass and that easily yield to pressure : capable of flowing

fluid

noun

Medical Definition of fluid (Entry 2 of 2)

: a substance (as a liquid or gas) tending to flow or conform to the outline of its container specifically : one in the body of an animal or plant — see cerebrospinal fluid, seminal fluid

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Comments on fluid

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