I. ˈfləks noun
Etymology: Middle English, from Anglo-French & Medieval Latin; Anglo-French, from Medieval Latin fluxus, from Latin, flow, from fluere to flow — more at fluid
Date: 14th century
1. : a flowing of fluid from the body: as
a. : diarrhea
b. : dysentery
2. : a continuous moving on or passing by (as of a stream)
3. : a continued flow : flood
4.
a. : influx
b. : change , fluctuation
in a state of flux
5. : a substance used to promote fusion (as of metals or minerals) ; especially : one (as rosin) applied to surfaces to be joined by soldering, brazing, or welding to clean and free them from oxide and promote their union
6. : the rate of transfer of fluid, particles, or energy across a given surface
II. verb
Date: 15th century
transitive verb
1. : to cause to become fluid
2. : to treat with a flux
intransitive verb
: to become fluid : fuse