a space between two electrodes, across which a discharge of electricity may take place.
the electrodes and the space between, considered as a unit: used in ignition systems.
the space between two electrodes across which a spark can jump Sometimes shortened to gap
A gap in an otherwise closed electric circuit across which a discharge occurs at a prescribed voltage. The discharge often causes ionization of the surrounding gas and thereby very high temperatures, and can be exploited, as in spark plugs, to ignite engine fuel in a combustion chamber.
noun 1. an alternating-current power source with a condenser discharging across a spark gap.
noun 1. an informal name for electrician
noun, British. 1. spark plug (def 1). sparking plug noun 1. a device screwed into the cylinder head of an internal-combustion engine to ignite the explosive mixture by means of an electric spark which jumps across a gap between a point earthed to the body of the plug and the tip of a central insulated […]
noun, Electricity. 1. the minimum voltage required to produce a spark across a given spark gap.