Webster's Revised Unabridged Dictionary · 1913

Flux

Flux (fluks) , noun

[Latin fluxus, from fluere, fluxum, to flow: compareF. flux. See Fluent, and compare 1st & 2d Floss, Flush, n., 6.]

1.
The act of flowing; a continuous moving on or passing by, as of a flowing stream; constant succession; change.
By the perpetual flux of the liquids, a great part of them is thrown out of the body. — Arbuthnot
Her image has escaped the flux of things, And that same infant beauty that she wore Is fixed upon her now forevermore. — Trench
Languages, like our bodies, are in a continual flux. — Felton
2.
The setting in of the tide toward the shore, -- the ebb being called the reflux.
3.
The state of being liquid through heat; fusion.
4.
(Chemistry & Metallurgy) Any substance or mixture used to promote the fusion of metals or minerals, as alkalies, borax, lime, fluorite.

White flux is the residuum of the combustion of a mixture of equal parts of niter and tartar. It consists chiefly of the carbonate of potassium, and is white. -- Black flux is the ressiduum of the combustion of one part of niter and two of tartar, and consists essentially of a mixture of potassium carbonate and charcoal.

5.
(a) (Medicine) A fluid discharge from the bowels or other part; especially, an excessive and morbid discharge; as, the bloody flux or dysentery. See Bloody flux.
(b)
(Medicine) The matter thus discharged.
6.
(Physics) The quantity of a fluid that crosses a unit area of a given surface in a unit of time.

Flux , adjective

[Latin fluxus, past participle of fluere. See Flux, n.]

Flowing; unstable; inconstant; variable.
The flux nature of all things here. — Barrow

Flux (flukst) , transitive verb

1.
To affect, or bring to a certain state, by flux.
He might fashionably and genteelly... have been dueled or fluxed into another world. — South
2.
To cause to become fluid; to fuse. — Kirwan
3.
(Medicine) To cause a discharge from; to purge.