noun
kabuki curtain; traditional three-color curtain
Refers to the striped curtain used in kabuki theaters, typically with three colored panels (often black, green, and persimmon). A specialized cultural term.
歌舞伎座の舞台には定式幕がかかっている。
A kabuki curtain hangs on the stage of the Kabuki-za theater.
緞帳 is a thick, often Western-style stage curtain, while 定式幕 specifically refers to the traditional three-color kabuki curtain.
定式 (fixed style) + 幕 (curtain). The term refers to the standardized design of the kabuki curtain.