| spark gap | (n) a component of an ignition system; consists of two shaped electrodes and the space between them |
| spark gap | (n) the gap between two high-potential terminals |
| Spark gap | . (Elec.) The space filled with air or other dielectric between high potential terminals (as of an electrostatic machine, induction coil, or condenser), through which the discharge passes; the air gap of a jump spark. [ Webster 1913 Suppl. ] |