The electromotive force or the electrical potential difference between two points in a circuit expressed in volts.
By Andrew Zimmerman Jones. Definition: Voltage is a representation of the electric potential energy per unit charge. If a unit of electrical charge were placed in a location, the voltage indicates the potential energy of it at that point. In other words, it is a measurement of the energy contained within an electric field, or an electric circuit, at a given point. Voltage is a scalar quantity. The SI unit of voltage is the volt, such that 1 volt = 1 joule/coulomb Definition of TERMINAL VOLTAGE. : the voltage at the terminals of an electrical device (as a battery or a generator). ADVERTISEMENT. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis.  supply voltage. (electricity). The voltage obtained from a power source for operation of a circuit or device. 1  Facebook. 2  Twitter.  View More. Definition: The definition of voltage is the electromotive force or the electrical potential difference between two points in a circuit expressed in volts.  voltage-Computer Definition. Electric potential, expressed in volts (V).Voltage is the push, or pressure, behind current flow. See also current and volt. The force, or pressure, of electricity.  noun. An electromotive force or potential difference expressed in volts: the ratio of two voltages [mass noun]: the distortion is proportional to voltage. More example sentences. 1  The plasma screen consists of tiny gas plasma cells that are charged at exact electrical voltages to make a picture. Voltage. Voltage is electric potential energy per unit charge, measured in joules per coulomb (= volts). It is often referred to as electric potential, which then must be distinguished from electric potential energy by noting that the potential is a per-unit-charge quantity.  voltage. The force, or pressure, of electricity. Also known as potential.. Voltage drop is the difference in voltage from one end of an electrical circuit to the other. For instructional purposes, voltage is often compared to water pressure. See voltage drop, volt-amps and current Potential difference (voltage). A potential difference, also called voltage [voltage: The potential difference of a cell, electrical supply or electric component. It is measured in volts, 'V'.  volt·age. n. A measure of the difference in electric potential between two points in space, a material, or an electric circuit, expressed in volts. 
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definition of voltage