plural prosceniums
: the part of a stage that is in front of the curtain
The host walked onto the proscenium.
a proscenium arch [=an arch that is over the front of a stage]
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“Proscenium.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/proscenium. Accessed 20 Jun. 2026.
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