spark

noun

1.
a momentary flash of light
Derived from:
spark
2.
merriment expressed by a brightness or gleam or animation of countenance
3.
electrical conduction through a gas in an applied electric field
Derived from:
spark
4.
a small but noticeable trace of some quality that might become stronger
Derived from:
spark
5.
a small fragment of a burning substance thrown out by burning material or by friction
Derived from:
spark