volt UK /vəʊlt/US /voʊlt/noun 5verb 1forms 3 noun5 •In the International System of Units, the derived unit of electrical potential and electromotive force (voltage); the potential difference across a conductor when a current of one ampere uses one watt of power. Symbol: VIf the volt, ampere and ohm were taken as the absolute units, the practical units would be the ampere, begohm and begavolt, names just as convenient as ampere, coulomb and farad. — 1900 •A bright yellow-green colour often used in Nike products. •volt •(no longer used) A circular movement in which the horse goes round in a small circle. •(no longer used) A sudden movement to avoid a thrust; a parry. verb1 •(no longer used) To perform this movement. formsvolted · volting · volts