Not exclusively a flow of electrons. A better statement is that an electrical current is a movement of charged particles. Recognize that there are other things beside electrons that can carry electrical charges and move about...I know that an electrical current is the flow of electrons...
Information, or energy can flow the other way. Or both ways simultaneously.One thing I find confusing is that the flow of charge is not a one way street. It's bi-directional. You could be feeding a load but you could also find that you have harmonic noise contaminating the system that you're feeding. I picture it as a two way street. Something's flowing one way, something "else" is also flowing in the other way.
Was that pun intended, Bill, or do you sometimes conduct your chemistry outside the case?chemically in the case of a battery.