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

Team News Uruguay switched from the usual 4-4-2 formation to a more fluid 4-3-2-1 against Russia and reaped the benefits, but Oscar Tabarez will probably revert to type in expectation of a low-scoring game. SI.com, "World Cup Preview: Uruguay vs Portugal - Statistics, Team News, Predictions & More," 29 June 2018 LB Grayson Miller: The converted safety looked fluid and comfortable at weak-side linebacker after having only played there since the start of spring drills, due to a number of injuries at his new position. Chris Solari, Detroit Free Press, "MSU football stock watch: Who's up, down after spring game," 8 Apr. 2018 Still, talks remain fluid and ongoing between the secured creditor group and Liberty Media, according to the people. Emma Orr, Bloomberg.com, "IHeart Prepares for Bankruptcy as Soon as This Weekend," 1 Mar. 2018 These terms may also include gender fluid people, or those whose gender identity shifts over time or depending on the situation. Ayana Archie And Brandon Griggs, CNN, "It's Pride Month. Here's what you need to know," 13 June 2018 Because of the fluid nature of malware and how AV apps responds to it, the best solutions often move up and down the rankings. Mark Hachman, PCWorld, "Recent antivirus tests are bad news for paid security suites," 30 Jan. 2019 Depending on the amount of fluid loss, cerebrospinal fluid leaks can be life-threatening. Mark Lieber, CNN, "Woman's runny nose was actually fluid from inside her brain," 8 May 2018 All that fluid loss leads to dehydration, which causes many notorious hangover symptoms. Samantha Cassetty, NBC News, "The best way to bounce back from a hangover," 2 Apr. 2018 Loss of exhaust fluid causes the engine to slow down automatically to 50 mph. Erin Edgemon, AL.com, "UAB Hospital unveils new rolling, intensive care unit," 6 Jan. 2018

Recent Examples on the Web: Noun

Many are created by things that are a part of ordinary, modern living: printer ink, housecleaning fluids, furniture polish, electronics, and so on. Ann Lien, House Beautiful, "The 10 Best Air-Purifying Houseplants," 12 Mar. 2019 More rarely, people can develop cysts called dermoids (which contain tissue like skin, hair and teeth), cystadenomas (filled with fluid) and endometriomas (caused by endometriosis). Carolyn L. Todd, SELF, "Kate Beckinsale Reveals She Went to the Hospital for a Ruptured Ovarian Cyst," 28 Jan. 2019 He and Rodriguez-Rodriguez study the behavior of various fluids (including paints), and carbonation is a particularly fascinating topic within that discipline. Jennifer Ouellette, Ars Technica, "The secret to champagne’s universal appeal is the physics of bubbles," 31 Dec. 2018 As a result, the lack of circulation caused his head to fill with fluid. Madeline Farber, Fox News, "Texas dog found with shoelace embedded in neck, severely swollen head, saved by animal rescue," 6 Sep. 2018 The lungs might, for example, become congested with fluid, or patients might contract pneumonia. Lisa Schencker, chicagotribune.com, "Chicago-area hospitals aim to boost transplants with 'lung in a box'," 18 May 2018 My go-to is the Dr. Jart Ceramidin Liquid because the thick, lotion-like fluid makes my skin incredibly dewy and moist. Devon Abelman, Allure, "This Powerful Vitamin C Treatment Helped Me Get the Glass Skin of My Dreams," 19 Mar. 2019 Try Cascade, an abstracted interpretation flowers bending in the wind, rendered in fluid brushstrokes of navy (Deep Blue), marigold (Sunbeam), or taupe (Clay). Hadley Keller, House Beautiful, "The Perfect Floral Wallpaper for People Who Hate Florals," 19 Mar. 2019 Pneumonia in both lungs, which meant there was fluid, there was all kinds of stuff going on. Kayla Keegan, Good Housekeeping, "'The View' Fans Rally Behind Whoopi Goldberg After She Says "Came Close to Leaving the Earth"," 8 Mar. 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

20 Apr 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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