fluid

adjective
flu·​id | \ ˈflü-əd How to pronounce fluid (audio) \

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 How to pronounce fluidal (audio) \ adjective
fluidally \ ˈflü-​ə-​dᵊl-​ē How to pronounce fluidally (audio) \ adverb
fluidlike \ ˈflü-​ə-​dᵊl-​ˌlīk How to pronounce fluidlike (audio) \ adjective

Synonyms & Antonyms for fluid

Synonyms: Adjective

flowing, fluent, liquid

Antonyms: Adjective

hard, nonliquid, solid

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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

If parties continue to decline, political systems are likely to become at least more fluid, and at worst harder to govern. The Economist, "Are Western democracies becoming ungovernable?," 1 Aug. 2019 Key Talking Point The Citizens fielded a very strong starting lineup and were fluid in attack, wasting no time getting into their groove. SI.com, "Yokohama F. Marinos 1-3 Man City: Report, Ratings & Reaction as Kevin De Bruyne Stars in Tricky Win," 27 July 2019 The lineup from night to night is fairly fluid, and popular local CoCo Vandeweghe, coming of a long layoff with an ankle injury, showed up to win her set last Sunday in a loss to Philadelphia. Tod Leonard, San Diego Union-Tribune, "Column: San Diego sports tour: Aviators tennis perfect for a summer evening," 25 July 2019 So for now, the kicker search is fluid, a little bit desperate and, for me, totally captivating. Rich Campbell, chicagotribune.com, "The realistic expectation for the 2019 Bears is ______ . Our writers fill in the blanks on 4 topics before training camp.," 24 July 2019 The survey found many signs that the race remains fluid, as expected at this early stage of the campaign. Tarini Parti, WSJ, "Biden Has Poll Lead After First Democratic Debates," 11 July 2019 And while nothing’s signed off on, and these things are always fluid, there are some non-economic issues that the players and owners have found agreement on. Albert Breer, SI.com, "In Atlanta, Dan Quinn Is Ready to Show Off the Falcons’ Coaching Overhaul," 22 July 2019 That’s how fluid all of it is right now for the Padres, an organization with unprecedented assets and equally unprecedented options. San Diego Union-Tribune, "Column: Trade options on table for Preller, Padres show progress," 20 July 2019 Multiple sources tell CBS News the Mueller hearing may get pushed back to July 24, although the negotiations are still fluid. Rebecca Kaplan, CBS News, "Robert Mueller's congressional testimony could be delayed," 12 July 2019

Recent Examples on the Web: Noun

Mourinho's desire for fluid, attack-minded football was perfect for Lampard, who racked up goals and assists for fun. SI.com, "Jose Mourinho: The Legendary Portuguese Tactician's All-Time Best XI," 6 Aug. 2019 The fluids in his body wound up in the wrong places, an occupational hazard for astronauts. Anchorage Daily News, "What the Space Age taught us: Earth is the best of all possible worlds," 23 June 2019 Methanol is a type of alcohol that's often used as an ingredient in antifreeze, paint thinner, shellac, and windshield wiper fluid, according to MedlinePlus. Cory Stieg, refinery29.com, "Could Bootleg Alcohol Explain The Dominican Republic Deaths?," 18 June 2019 Children's staff confirmed the 10-year-old had a pacemaker on her heart, a port to receive IVIG and IV fluids, as well as a gastro tube. Karen Pilarski, Milwaukee Journal Sentinel, "Mom bound for trial in case of 10-year-old who police say received unnecessary medical procedures based on false health information," 10 June 2019 Of course, there's a scientific explanation for the marvel behind this marvelous material: Silly Putty is a non-Newtonian fluid. Roy Berendsohn, Popular Mechanics, "A Serious Ode To Silly Putty," 27 Dec. 2018 The crux of the treatment is a fluid containing EGF or epidermal growth factor (FDA-approved), obtained from the progenitor cells of human fibroblasts from Korean newborn baby foreskin. Kathleen Hou, The Cut, "I Tried The ‘Penis Facial’," 16 May 2018 In Germany, all but the northeastern coastal region was under a heat warning, with officials urging people to drink enough fluids and avoid going outdoors in the afternoon hours. Iliana Magra, BostonGlobe.com, "Paris records its hottest day in history as heat wave scorches Europe," 25 July 2019 Unlike its hulking, toothy brethren, the American Pocket Shark is a mere five-and-a-half inches long and attracts prey by secreting a glowing fluid from a tiny pocket gland near its front fins. Meghan Overdeep, Southern Living, "New Species of Tiny, Glowing Shark Discovered in the Gulf of Mexico," 22 July 2019

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 and Noun

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

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Statistics for fluid

Last Updated

10 Aug 2019

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 How to pronounce fluid (audio) \

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 How to pronounce fluid (audio) \

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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More from Merriam-Webster on fluid

Rhyming Dictionary: Words that rhyme with fluid

Thesaurus: All synonyms and antonyms for fluid

Spanish Central: Translation of fluid

Nglish: Translation of fluid for Spanish Speakers

Britannica English: Translation of fluid for Arabic Speakers

Britannica.com: Encyclopedia article about fluid

Comments on fluid

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