Pronunciation

change

Singular
flux

Plural
fluxes

  1. A flux is a chemical agent for cleaning metal prior to soldering or welding.
    It is important to use flux when soldering or oxides on the metal will prevent a good bond.
  2. Flux is the action or process of flowing.

Plain form
flux

Third-person singular
fluxes

Past tense
fluxed

Past participle
fluxed

Present participle
fluxing

  1. (transitive) If you flux metal, you use flux on it to promote melting.
    You have to flux the joint before soldering.