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

Though Riley Greene, the team’s No. 5 pick this past spring, possesses easy power and a fluid and promising swing. Shawn Windsor, Detroit Free Press, "Tigers owner asks for more patience. It's getting harder to accommodate him | Opinion," 5 July 2019 Multiple sources say the process is fluid and several other names are also being considered. Fin Gomez, CBS News, "White House eyes candidates to replace Sarah Sanders," 14 June 2019 And this is a very fluid and fast-moving environment. Kathleen Gray, Detroit Free Press, "In the Upper Peninsula, weed is a lonely pursuit for its one and only dispensary," 10 June 2019 Until that first Pulitzer, Wilson — a fluid and elegant writer — had mostly published for the academy. Quanta Magazine, "In Ecology Studies and Selfless Ants, He Finds Hope for the Future," 15 May 2019 The source said that situation remains fluid, but Cutting is expected to be on hand when training camp begins in late July. Chris Tomasson, Twin Cities, "Vikings long snapper Kevin McDermott calls competition with rookie Austin Cutting ‘a good thing’," 10 June 2019 The situation is fluid, as most roster decisions are. San Diego Union-Tribune, "Padres notes: Naylor makes case to stay in majors; Machado’s ‘bittersweet’ move," 7 June 2019 Hunter is functionally strong, but not extremely fluid or explosive, and lacks natural instincts as a scorer playing off the dribble. Jeremy Woo, SI.com, "2019 NBA Draft Big Board 7.0: Top 100 Prospect Rankings," 5 June 2019 The front of the dress is quite pure and fluid, while the back of the dress is more dramatic—the skirt fans out into a long train. Leena Kim, Town & Country, "Designer Luisa Beccaria Reveals What It Was Really Like to Make Lady Gabriella Windsor's Wedding Dress," 18 May 2019

Recent Examples on the Web: Noun

In nature, using air as the fluid, lotus leaves and insect cuticles are both famously good at superhydrophobicity. The Economist, "How to make a better raincoat with tiny “water bowls”," 4 July 2019 The pace is quick and the writing fluid, although at times sentences ring flat, as if missing a beat or a bit of evocative imagery. Jeffrey Fleishman, latimes.com, "Malin Persson Giolito looks for elusive justice in thriller ‘Beyond All Reasonable Doubt’," 3 July 2019 The chances continued to mount for Mourinho's men and Arsenal struggled to cope with the fluid passing from the United midfield. SI.com, "Marouane Fellaini Strikes to Ruin Arsene Wenger's Last Trip to Old Trafford," 29 Apr. 2018 The researchers analyzed the fluids from each patient to infer the most likely cause of their pneumonia from a list of 30 pathogens. Alex Fox, Science | AAAS, "Viruses—not bacteria—cause most childhood pneumonia," 27 June 2019 The researchers then sent the fluid in which the embryos grew, plus the embryos themselves, to be sequenced. Daniela Hernandez, WSJ, "New Noninvasive Genetic Tests for IVF Embryos Are in Development," 24 June 2019 The green flames can be attributed to the fluid that the BE-7 uses to start the ignition of the engine. Loren Grush, The Verge, "Blue Origin fires up the engine of its future Moon lander for the first time," 20 June 2019 That makes the soft-bodied robot a perfect match for the fluid used in flow batteries. John Timmer, Ars Technica, "Researchers make a robotic fish with a battery for blood," 19 June 2019 The fluid, ad hoc nature of the movement was evident Monday, as hundreds of youths lingered near Lam’s office building. Washington Post, "Hong Kong opposition movement largely without leaders," 18 June 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

13 Jul 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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