What is the meaning of Clothesline?

A rope or cord tied up outdoors to hang clothes on so they can dry.

A structure with multiple cords for the same purpose, such as a Hills hoist.

The 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.

To knock (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.

Source: wiktionary.org