Definition of postscenium in US English:

postscenium

(also postscaenium)

noun

Classical Theatre
  • A part of an ancient Greek or Roman theatre behind the stage, where props could be stored and to which the actors retired.

Origin

Early 18th century; earliest use found in Ephraim Chambers (?1680–1740), encyclopaedist. From classical Latin postscaenium from post- + scaena + -ium, after proscaenium.

Pronunciation

postscenium

/ˌpəʊs(t)ˈsiːnɪəm/