1. noun
a) An irregular line left from smearing or motion.
The picture I took out the car window had streaks.
b) A continuous series of like events.
I hope I can keep up this streak of accomplishments.
2. verb
a) to have or obtain streaks.
If you clean a window in direct sunlight, it will streak.
b) to run naked in public
It was a pleasant game until some guy went streaking across the field.
Wikipedia foundation.