voltage

noun

1. (countable, uncountable)The difference in electrostatic potential between two points in space, especially between live and neutral conductors or the earth.

   “The voltage between the wires is too low to produce a spark.”

   “Be careful when opening high-voltage equipment.”

   “The system voltage is 630 volts d.c. and the supply to the trains is by top-contact third rail with running rail return.”