spark in WordNet English dictionary

1. put in motion or move to act
   "trigger a reaction"; "actuate the circuits"
   trip  actuate  trigger  activate  set off  spark off  spark  trigger off  touch off 
   
2. emit or produce sparks
   "A high tension wire, brought down by a storm, can continue to spark"
   spark  sparkle 
   

1. electrical conduction through a gas in an applied electric field
   discharge  spark  arc  electric arc  electric discharge 
   
2. a momentary flash of light
   flicker  spark  glint 
   
3. merriment expressed by a brightness or gleam or animation of countenance
   "he had a sparkle in his eye"; "there's a perpetual twinkle in his eyes"
   sparkle  twinkle  spark  light 
   
4. a small fragment of a burning substance thrown out by burning material or by friction
   spark 
   
5. a small but noticeable trace of some quality that might become stronger
   "a spark of interest"; "a spark of decency"
   spark