Voltage

Voltage is a measure of the force on a unit charge at a given point in space due to all the other "local" charges. It is similar to the gravitational pull on a unit mass in space, except that, since charges can be + and -, the force can be attractive or repulsive. 1 Volt = force required to produce a current of 1 Ampere in a wire of 1 Ohm resistance.

Voltage is the difference in electrical potential between any two conductors or between a conductor and ground. It is a measure of the electric energy per electron that electrons can acquire and/or give up as they move between the two conductors.