When one "draws a line," they are establishing a boundary or limit. There are many synonyms for this phrase, depending on the context in which it is used. Some possible synonyms for drawing a line might include "setting a boundary," "establishing a limit," "defining a perimeter," or "establishing a demarcation." Other related phrases might include "marking off territory," "stating one's boundaries," or "establishing a line of demarcation." Regardless of the words used, the act of drawing a line is a powerful tool for communication, self-assertion, and boundary-setting in a wide range of situations.