\ ˈfləks How to pronounce flux (audio) \

Definition of flux

 (Entry 1 of 2)

1 : a flowing of fluid from the body: such as
2 : a continuous moving on or passing by (as of a stream)
3 : a continued flow : flood a flux of words
4a : influx
b : change, fluctuation in a state of flux the flux following the death of the emperor
5 : a substance used to promote fusion (as of metals or minerals) especially : one (such as rosin) applied to surfaces to be joined by soldering, brazing, or welding to clean and free them from oxide and promote their union
6 : the rate of transfer of fluid, particles, or energy across a given surface


fluxed; fluxing; fluxes

Definition of flux (Entry 2 of 2)

transitive verb

1 : to cause to become fluid
2 : to treat with a flux

intransitive verb

: to become fluid : fuse

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Synonyms & Antonyms for flux

Synonyms: Noun

Synonyms: Verb

Antonyms: Verb

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Examples of flux in a Sentence

Noun the English language is always in a state of flux January typically brings a great flux of returns to department stores. Verb a solid will flux more quickly under pressure
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Recent Examples on the Web: Noun Please note that the NFL season has been in flux due to COVID-19. Erin Cavoto, Country Living, "What Day Is Super Bowl 2021? Here's Everything You Need to Know About the Big Game," 17 Dec. 2020 But with supply tight in first shipments, hospitals across the U.S. have been forced to decide who goes first, with plans in flux up to the final days. Melanie Evans, WSJ, "Covid-19 Vaccine’s Initial Scarcity Leads to Tough Choices for Hospitals," 14 Dec. 2020 The timeline remains in flux for turning in the apportionment numbers used for deciding how many congressional seats and Electoral College votes each state gets in future elections, the Census Bureau said in a statement late Wednesday. Mike Schneider, Star Tribune, "Census Bureau says data irregularities being fixed quickly," 3 Dec. 2020 Their infield could be further in flux this week as the deadline looms to tender contracts to Hanser Alberto and Pat Valaika, each of whom is eligible for salary arbitration. Jon Meoli, baltimoresun.com, "Orioles trade veteran infielder José Iglesias to Los Angeles Angels, report says," 2 Dec. 2020 More:Matthew Stafford's future in flux as Detroit Lions await new direction ... Free Press Staff, Detroit Free Press, "Former state Sen. Tom Casperson dies at 61," 30 Nov. 2020 With cases surging nationally as well as around Louisiana, holiday plans are in flux and travel is questionable. Ian Mcnulty | Staff Writer, NOLA.com, "Gumbo on your wish list? Shipping dishes becomes lifeline for New Orleans restaurants," 27 Nov. 2020 The process is expected to remain in flux for the next few weeks, as Mr. Biden continues to deliberate with his most senior aides and focuses first on filling out key West Wing positions. CBS News, "Joe Biden's top Cabinet contenders come into focus," 19 Nov. 2020 The Southeastern Conference’s football schedule is in flux following a weekend of COVID-19 postponements. Jon Hale, The Courier-Journal, "Terry Wilson's Kentucky football story isn't finished yet: 'I respect the way he responded'," 15 Nov. 2020 Recent Examples on the Web: Verb Those signs can flux when sleep deprived, traveling or stressed at work as well. Sandee Lamotte, CNN, "Intuitive eating: The anti-diet, or how pleasure from food is the answer, say its creators," 31 Jan. 2020 Next, clean and flux a shutoff valve for the cold side and slide it over the tubing end place and solder it in place. Steve Willson, Popular Mechanics, "How To Install An Electric Water Heater," 24 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'flux.' 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 flux


14th century, in the meaning defined at sense 1


15th century, in the meaning defined at transitive sense 1

History and Etymology for flux

Noun and Verb

Middle English, from Anglo-French & Medieval Latin; Anglo-French, from Medieval Latin fluxus, from Latin, flow, from fluere to flow — more at fluid

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Time Traveler for flux

Time Traveler

The first known use of flux was in the 14th century

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Statistics for flux

Last Updated

28 Dec 2020

Cite this Entry

“Flux.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flux. Accessed 19 Jan. 2021.

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More Definitions for flux


How to pronounce flux (audio)

English Language Learners Definition of flux

: a series of changes : continuous change
technical : a substance used for helping to melt or join metals


\ ˈfləks How to pronounce flux (audio) \

Medical Definition of flux

1a : a flowing or discharge of fluid from the body especially when excessive or abnormal: as
(1) : diarrhea
(2) : dysentery
b : the matter discharged in a flux
2 : the rate of transfer of fluid, particles, or energy across a given surface

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