the action or process of flowing or flowing out

the flux of ions across the membrane

an abnormal discharge of blood or other matter from or within the body

continuous change

since the fall of the wall Berlin has been a city in flux

the whole political system is in a state of flux

a substance mixed with a solid to lower its melting point, used especially in soldering and brazing metals or to promote vitrification in glass or ceramics

treat (a metal object) with a flux to promote melting