noun (n)

• the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts(noun.phenomenon)

  Synonym:
  electromotive force, emf
  

  source: wordnet30
• the difference in electrical charge between two points in a circuit expressed in volts(noun.phenomenon)

  Synonym:
  electric potential, potential, potential difference, potential drop
  

  source: wordnet30
• Electric potential or potential difference, expressed in volts.(noun)

  source: webster1913