a long, thin line or mark of a different substance or colour from its surroundings

a streak of oil

she could see white streaks in his beard

an element of a specified kind in someone's character

there's a streak of insanity in the family

Lucy had a ruthless streak

an act of running naked in a public place so as to shock or amuse others

a streak for charity

cover (a surface) with streaks

tears streaking her face, Cynthia looked up

his beard was streaked withgrey

move very fast in a specified direction

the cat streaked across the street

run naked in a public place so as to shock or amuse others

the singer admitted to streaking in his home town in the seventies