Dictionary

The act of flowing; a continuous moving on or passing by, as of a flowing stream.

A state of ongoing change.

Example: Languages, like our bodies, are in a continual flux.

A chemical agent for cleaning metal prior to soldering or welding.

Example: It is important to use flux when soldering or oxides on the metal will prevent a good bond.

The rate of transfer of energy (or another physical quantity) through a given surface, specifically electric flux, magnetic flux.

Example: That high a neutron flux would be lethal in seconds.

To use flux on.

Example: You have to flux the joint before soldering.

To melt.

To flow as a liquid.

Flowing; unstable; inconstant; variable.