D defs.my
Entry 2 senses Webster, 1913

Diorama

· Di·o·ra·ma · IPA /ˌdaɪəˈrɑmə/
01 n. A mode of scenic representation, invented by Daguerre and Bouton, in which a painting is seen from a distance through a large opening. By a…
  1. 1.
    A mode of scenic representation, invented by Daguerre and Bouton, in which a painting is seen from a distance through a large opening. By a combination of transparent and opaque painting, and of transmitted and reflected light, and by contrivances such as screens and shutters, much diversity of scenic effect is produced.
  2. 2.
    A building used for such an exhibition.