stage
The German word 'Bühne' is used to refer to a stage in a theater or any other performance space. It is a noun and is used in a similar way to the English word 'stage'. For example, 'Die Schauspieler betreten die Bühne' translates to 'The actors enter the stage'.
She went on stage
This is a phrase used to indicate someone literally stepping onto the stage, usually in the context of a performance or an event.
The stage was very big
This phrase can be used to describe the physical size of a stage. It's common in contexts where the size of a stage is remarkable.
I am leaving the stage
This phrase is used by performers to indicate that they are exiting the stage. It could also be used metaphorically to mean someone is ending their role or participation in an event.