An irregular line left from smearing or motion.

“The picture I took out the car window had streaks.”

A continuous series of like events.

“I hope I can keep up this streak of accomplishments.”

The color of the powder of a mineral. So called, because a simple field test for a mineral is to streak it against unglazed white porcelain.

To have or obtain streaks.

“If you clean a window in direct sunlight, it will streak.”

To run naked in public. (Contrast flash)

“It was a pleasant game until some guy went streaking across the field.”

To create streaks.

“You will streak a window by cleaning it in direct sunlight.”