what is a box set?
<answer> Box set, in Western theatre, realistically detailed, three-walled, roofed setting that simulates a room with the fourth wall removed. <context> Box set. Box set, in Western theatre, realistically detailed, three-walled, roofed setting that simulates a room with the fourth wall (the one closest to the audience) removed. Authentic details include doors with three-dimensional moldings, windows backed with outdoor scenery, stairways, and, at times, painted highlights and shadows.