curtainとは何ですか？ curtainとは何ですか？ Material that hangs in a window or other opening as a decoration, shade, or screen.Something that functions as or resembles a screen, cover, or barrier: the curtain of mist before the mountain; a heavy curtain of artillery fire. The movable screen or drape in a theater or hall that separates the stage from the auditorium or that serves as a backdrop. The rising or opening of a theater curtain at the beginning of a performance or act.The time at which a theatrical performance begins or is scheduled to begin.The fall or closing of a theater curtain at the end of a performance or act.The concluding line, speech, or scene of a play or act.The part of a rampart or parapet connecting two bastions or gates.Architecture A curtain wall.Slang The end.Slang Absolute ruin: "If the employee doesn't shape up, it's curtains” ( Business Week). Slang Death.To provide (something) with or as if with a curtain.To shut off (something) with or as if with a curtain.