Fetching details from the dictionary...

stage (of a theatre, concert hall, etc.); (stage) performance
setting (of a story); scene
sphere (of activity); stage (e.g. political stage); scene; arena; world
明日、学校の舞台で発表します。
Tomorrow, I will give a presentation on the school stage.
この小説の舞台は江戸時代だ。
This novel is set in the Edo period.
舞台の上で堂々と歌を歌いました。
I sang a song on the stage.