fluid

1 of 2

adjective

flu·​id ˈflü-əd How to pronounce fluid (audio)
1
a
: 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
3
a
: available for various uses
a fluid computer program
b
: liquid sense 4
fluid assets
fluidly adverb
fluidness noun

fluid

2 of 2

noun

: a substance (such as a liquid or gas) tending to flow or conform to the outline of its container
fluidal adjective
fluidally adverb
fluidlike adjective

Example Sentences

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 See More
Recent Examples on the Web
Adjective
Contrapuntal, or stereoscopic, reading felt like an exciting approach to the Russian canon, in which categories like victim and perpetrator—or center and periphery—are particularly fluid. Elif Batuman, The New Yorker, 23 Jan. 2023 Carlisle has chosen not to do that so far, sticking with a nine-man rotation and a more fluid substitution pattern. Dustin Dopirak, The Indianapolis Star, 21 Jan. 2023 Talks are fluid, but the framework being discussed to win over some of the McCarthy critics is coming together. Kathryn Watson, Stefan Becket, Caroline Linton, CBS News, 6 Jan. 2023 Driven hard on sweeping curving roads among desert rock formations, the car was fluid, holding the road with ease. Mark Phelan, Detroit Free Press, 19 Dec. 2022 Those things are fluid and few teams are good enough to repeat year after year. Tim Cowlishaw, Dallas News, 10 Oct. 2022 The village was divided between Russian forces in the southern neighborhoods and Ukrainian forces in the northern ones, though the fronts were fluid and ambiguous. Luke Mogelson, The New Yorker, 26 Dec. 2022 The officers involved had a duty to de-escalate this very fluid situation and give Mr. Naji the time, opportunity, and space to put down his firearm. Andrea May Sahouri, Detroit Free Press, 22 Dec. 2022 As of Thursday, ground teams at Mission Control in Moscow continue assessing the leak, evaluating the fluid and potential impacts to the integrity of the Soyuz spacecraft. Stephanie Mlot, PCMAG, 15 Dec. 2022
Noun
Later that afternoon, Erica Guardiola, a nurse wearing scrubs and her hair in a ponytail, stopped by Saltzman’s trailer to draw his blood and dispense another liter of IV fluid. Helen Ouyang, New York Times, 26 Jan. 2023 Fiber needs fluid to help move through the digestive system. Amanda Macmillan, Health, 25 Jan. 2023 This fluid sends essential nutrients to the cartilage in a joint space, creating a slicker surface for joints. Dallas News, 24 Jan. 2023 Green burial is the most straightforward option for someone wanting to avoid depositing hazardous embalming fluid into the ground while minimizing the need for wood, concrete, and other materials that require energy to produce. Danielle Seurkamp, Forbes, 24 Jan. 2023 The fluid’s water and salivary proteins lubricate each mouthful of food, and its enzymes such as amylase and lipase kickstart the process of digestion. Chris Gorski, Smithsonian Magazine, 24 Jan. 2023 Still, no amount of practice could prevent one unexpected difficulty during filming, involving an excess of bodily fluid. Rebecca Rubin, Variety, 22 Jan. 2023 Your cells also pump fluid into the bloodstream to help flush out sugar. Elizabeth Woolley, Verywell Health, 22 Jan. 2023 The fluid’s water and salivary proteins lubricate each mouthful of food, and its enzymes such as amylase and lipase kickstart the process of digestion. Chris Gorski, USA TODAY, 21 Jan. 2023 See More

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.

Word History

Etymology

Adjective and Noun

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

First Known Use

Adjective

1603, in the meaning defined at sense 1a

Noun

1661, in the meaning defined above

Time Traveler
The first known use of fluid was in 1603

Dictionary Entries Near fluid

Cite this Entry

“Fluid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluid. Accessed 5 Feb. 2023.

Kids Definition

fluid

1 of 2 adjective
flu·​id ˈflü-əd How to pronounce fluid (audio)
1
a
: capable of flowing like a liquid or gas
b
: likely or tending to change or move
2
: showing a smooth easy style
fluid movements
fluidly adverb
fluidness noun

fluid

2 of 2 noun
: a substance tending to flow or take the shape of its container
liquids and gases are fluids
fluidlike adjective

Medical Definition

fluid

1 of 2 adjective
flu·​id ˈflü-əd How to pronounce fluid (audio)
: 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

2 of 2 noun
: 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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