The eyebrow is an area of thick, delicate hairs above the eye that follows the shape of the lower margin of the brow ridges of some mammals. Eyebrows come in many shapes and sizes, some people (generally men) have thick and bushy eyebrows, whereas others (generally women) have thinner, more pointed eyebrows. The
eyebrows main function is hypothesized to prevent sweat, water, and other debris from falling down into the eye socket, but they are also important to human communication and facial expression. It is not uncommon for people to modify their eyebrows by means of hair addition, removal and makeup.