Backside/ˈbæksaɪd/ Definition 1 of 2Pro Tip 1/3Part of Whole Use 'backside' when referring to part of an object, not a full view. The graffiti covered the backside of the billboard. Pro Tip 2/3Physical Position Indicates position opposite to the front, often hidden or not easily seen. The instructions are printed on the backside of the form. Pro Tip 3/3Not for People Avoid using 'backside' for the rear part of a person, it's often mistaken. The backside of the statue faces the wall.