(noun, adjective, verb)


1. (uncommon) Flowing; unstable; inconstant; variable.


1. the rate of flow of energy or particles across a given surface

Definition categories: time, rate

2. a flow or discharge

Similar word(s): fluxion

Definition categories: event, flow, flowing

3. a substance added to molten metals to bond with impurities that can then be readily removed

Definition categories: substance, chemical

4. excessive discharge of liquid from a cavity or organ (as in watery diarrhea)

Definition categories: state, pathology

5. 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

Definition categories: state

6. the lines of force surrounding a permanent magnet or a moving charged particle

Definition categories: phenomenon, field

7. (physics) the number of changes in energy flow across a given surface per unit area

Definition categories: attribute, denseness, density

8. in constant change

- his opinions are in flux

- the newness and flux of the computer industry

Definition categories: act, change

Sentences with flux as a noun:

- The schedule is in flux at the moment.

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

- That high a neutron flux would be lethal in seconds.


1. move or progress freely as if in a stream

Similar word(s): flow

Definition categories: motion, move

2. become liquid or fluid when heated

Similar word(s): liquefy, liquify

Definition categories: change

3. mix together different elements

Similar word(s): blend, coalesce, combine, commingle, conflate, fuse, immix, meld, merge, mix

Definition categories: change

Sentences with flux as a verb:

- You have to flux the joint before soldering.