A point considered to be at nominal zero potential and to which all other potentials in the circuit are referred, often, but not always, connected to the actual surface of the earth; as a verb to connect to a ground. Also called earth.
The difference in the electrical condition of the terminals "+" and "-" of the dry cell which tends to make electricity flow we describe as a difference of electrical potential.
A unit of electrical resistance equal to that of a conductor in which a current of one ampere is produced by a potential of one volt across its terminals.