1.NounA rope or cord tied up outdoors to hang clothes on so they can dry.
"Hang this towel out on the clothesline for me."
2.NounA structure with multiple cords for the same purpose, such as a Hills hoist.
3.NounThe act of knocking a person over by striking his or her upper body or neck with one's arm, as if he or she had run into a low clothesline.
4.VerbTo knock (a person) over by striking them across the neck or upper body with an outstretched arm, mimicking the motion of running into a low clothesline.
"The referee called a personal foul, when he clotheslined the running back."