the rate of flow of energy or particles across a given surface
"The magnetic flux through the coil increased as the magnet moved closer to it."
a substance added to molten metals to bond with impurities that can then be readily removed
"The metallurgist added borax flux to the molten copper to bind with sulfur and other impurities before casting."
excessive discharge of liquid from a cavity or organ (as in watery diarrhea)
"The severe infection caused a dangerous flux that left the patient dehydrated within hours."
a state of uncertainty about what should be done (usually following some important event) preceding the establishment of a new direction of action
"the flux following the death of the emperor"
the lines of force surrounding a permanent magnet or a moving charged particle
"The invisible flux from the permanent magnet pulled the iron filings into distinct patterns on the table."
(physics) the number of changes in energy flow across a given surface per unit area
"The magnetic flux through the coil increased as the magnet moved closer to its center."
The act of flowing; a continuous moving on or passing by, as of a flowing stream.
"The gentle flux of water over the rocks created a soothing sound in the valley."
In plain English: Flux is a state of constant change where things are always moving and unstable instead of staying still.
"The temperature in the room was constantly in flux due to the changing weather outside."
Usage: Use the noun flux to describe something that is constantly changing or fluctuating rather than remaining stable. It often appears in phrases like "in a state of flux" to indicate ongoing instability without implying physical flow.
To use flux on.
"The technician used flux to prepare the soldering point before applying heat."
Flowing; unstable; inconstant; variable.
"The state of the stock market was in a constant flux, making it difficult to predict future trends."
In plain English: Flux is something that changes quickly and unpredictably, never staying still for long.
"The state of constant flux in her schedule made it hard to plan weekends."
The word comes from the Old French flux, which was borrowed directly from the Latin fluxus. In its original form, it simply meant "a flow."