A multiplex show is a type of entertainment event that combines multiple forms of media, such as movies, music, and live performances. It is usually held in a large venue, such as a theater or stadium, and can feature a variety of different acts. The term 'multiplex show' comes from the fact that it is a combination of multiple forms of entertainment. In this particular crossword, the solution for the term 'multiplex show' is 'MOVIE, ' which is a common form of entertainment featured in multiplex shows.