An irregular line left from smearing or motion.
"The child's cheek had a pink streak where his thumb smeared the paint."
In plain English: A streak is when something happens repeatedly without any breaks for a while, like getting lucky several times in a row or having a long period of good weather.
"The team went on an incredible winning streak last month."
Usage: Use the noun form to describe an isolated mark, such as a hairline fracture in glass or a single dark spot on white fabric, rather than for continuous patterns which imply repetition. When used as a verb, it specifically means to move quickly across a surface leaving these marks behind.
run naked in a public place
"After winning the lottery, he decided to streak down Main Street before anyone could stop him."
To have or obtain streaks.
"The athlete managed to streak through the crowded hallway without being stopped by security."
In plain English: To streak means to run away quickly and suddenly, often without saying anything first.
"The cat streaked across the floor to catch its toy mouse before anyone could see it."
From Middle English streke, from Old English strica, from Proto-Germanic strikiz, from Proto-Indo-European streyg- ("line"). Related to North Frisian strijck, Old Saxon striki, Middle Low German streke, Low German streek, Danish streg, Swedish streck, Norwegian BokmΓ₯l strek, Icelandic stryk, strykr, Dutch streek, Afrikaans streek, Old High German strih, German Strich, Gothic ππππΉπΊπ (striks).