flux [ flʌks ] noun
1. ) uncount a condition of continuous change:
in a state of flux: The climate appears to be in a state of flux.
in flux: The committee's ideas were still in flux.
2. ) count or uncount SCIENCE the rate at which matter or energy flows across a surface or area
3. ) uncount TECHNICAL a substance used for joining two pieces of metal together

Usage of the words and phrases in modern English. 2013.