1.a momentary flash of light
2.brightness and animation of countenance;
he had a sparkle in his eye
3.electrical conduction through a gas in an applied electric field
4.a small but noticeable trace of some quality that might become stronger;
a spark of interest
5.a small fragment of a burning substance thrown out by burning material or by friction
1.put in motion or move to act;
trigger a reaction
2.emit or produce sparks;
A high tension wire, brought down by a storm, can continue to spark