1 fluid | Definition of fluid

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 openings — Technical 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
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Recent Examples on the Web: Adjective

Actress Kristen Stewart—speaking in a recent Harper's Bazaar UK profile—says she was pressured to keep her fluid sexuality secret in order to boost her career. — Isaac Feldberg, Fortune, "Kristen Stewart Was Told She ‘Might Get A Marvel Movie’ if She Kept Her Sexuality Quiet," 3 Sep. 2019 The fluid nature of Six Sigma, and its potential for almost unlimited abuse, was explained by Mikel Harry, a former Motorola executive and colleague of Bill Smith’s who became a Six Sigma evangelist and founder of the Six Sigma Management Institute. — Oliver Staley, Quartz at Work, "Whatever happened to Six Sigma?," 3 Sep. 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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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 | \
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