spark1
  
  n.
   - a small fiery particle thrown off from a fire, alight in ashes, or produced by striking together two surfaces.
- a light produced by a sudden disruptive electrical discharge through the air. ▸a discharge such as this serving to ignite the explosive mixture in an internal-combustion engine. 
- a small but concentrated amount or trace:![]()  a tiny spark of anger. ▸a sense of liveliness and excitement. 
v.
   - emit sparks. ▸produce sparks at the point where an electric circuit is interrupted. 
- ignite.
- 
(usu. spark something off)
 provide the stimulus for.
Phrase
  
    
      - spark out
 Brit. informal completely unconscious.
 
  Derivative
  
  Etymology
  OE spærca, spearca, of unknown origin.