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.

The current per unit of a cross-sectional area of a conductor.

1. An instrument that is used for measuring the magnitude of electric current flow.
2. A device which is used to measure the magnitude of an electric current of several amperes or more.

An ammeter is usually combined with a voltmeter and an ohmmeter in a multipurpose tool.