potential difference

n. (Symbol V)
The amount of energy per unit charge needed to move a charged particle from a reference point to a designated point in a static electric field; voltage. Also called potential.

Voltage difference between two points which will cause current to flow in a closed circuit.

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The noun has one meaning:

Meaning #1: the difference in electrical charge between two points in a circuit expressed in volts
  Synonyms: electric potential, potential, potential drop, voltage

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