1. The time rate of flow of an electric charge, in the direction that a positive moving charge would take and having magnitude equal to the quantity of charge per unit of time measured in amperes.
2. Charged particles, most often electrons, moving through a conductor or transmitter; such as, copper and aluminum.
3. A flow of charged particles; such as, electrons or protons, accompanied by the field which they generate.
4. Movement of electric charge carriers.

In a wire, electric current is a flow of electrons that have been dislodged from atoms and is a measure of the quantity of electrical charge passing any point of the wire per unit of time.