Pronunciation Noun


  1. The act of flowing; a continuous moving on or passing by, as of a flowing stream.
    • By the perpetual flux of the liquids, a great part of them is thrown out of the body.
    • 1991, Mann, H., Fyfe, W., Tazaki, K., & Kerrich, R., Biological Accumulation of Different Chemical Elements by Microorganisms from Yellowstone National Park, USA. Mechanisms And Phylogeny Of Mineralization In Biological Systems, 357-362.
      Investigation of the silica budget for the Upper and Lower Geyser Basins of Yellowstone National Park by Truesdell et al. suggest that the present fluxes of hotspring water and thermal energy may have been continuous for at least the past 10,000 yr.
  2. A state of ongoing change.
    The schedule is in flux at the moment.
    Languages, like our bodies, are in a continual flux.
    • Her image has escaped the flux of things, / And that same infant beauty that she wore / Is fixed upon her now forevermore.
  3. A chemical agent for cleaning metal prior to soldering or welding.
    It is important to use flux when soldering or oxides on the metal will prevent a good bond.
  4. (physics) The rate of transfer of energy (or another physical quantity) through a given surface, specifically electric flux, magnetic flux.
    That high a neutron flux would be lethal in seconds.
  5. (archaic) A disease which causes diarrhea, especially dysentery.
  6. (archaic) Diarrhea or other fluid discharge from the body.
  7. The state of being liquid through heat; fusion.
  • (state of ongoing change) stasis
Translations Translations
  • French: décapant
  • German: Fließmittel
  • Italian: flussante
  • Portuguese: fundente
  • Russian: флюс
  • Spanish: fundente
Translations Verb

flux (fluxes, present participle fluxing; past and past participle fluxed)

  1. (transitive) To use flux on.
    You have to flux the joint before soldering.
  2. (transitive) To melt.
  3. (intransitive) To flow as a liquid.
Related terms Adjective

flux (not comparable)

  1. (uncommon) Flowing; unstable; inconstant; variable.
    • ante 1677 Isaac Barrow, "On Contentment", Sermon XL, in The Theological Works, Volume 2, Clarendon Press, 1818, page 375 ↗:
      The flux nature of all things here.
Related terms Related terms

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