n.
   - a long, thin mark of a different substance or colour from its surroundings.
 - an element of a specified kind in someone's character:
 a ruthless streak.
 - a spell of specified success or luck.
 
v.
   - mark with streaks.
 - move very fast in a specified direction.
 - informal run naked in a public place so as to shock or amuse.
 
 
  Phrase
  
    - like a streak
 informal very fast.  - streak of lightning
 a flash of lightning. 
   
  Derivative
  
  Etymology
  OE strica, of Gmc origin; rel. to strike.