Definition of box set:
(n) :
Related musical or video recordings that are gathered on multiple items of the same kind of media (compact discs, DVDs, VHS tapes, etc.) and placed in a box to be sold as a unit.
(n) :
A set of such recordings made available to be watched or listened to online or on television, without existing in material box form.
(n) :
A set of related books from a particular author or genre that are marketed as a boxed collection.
(n) :
(theater) A set with a proscenium arch stage and three walls, creating the appearance of an enclosed room.
(n) :
(film, television) A set with three walls, allowing the camera to film in a room-like space.