The phrase "a vast stage" is correct and usable in written English.
It can be used to describe a large or expansive area, often in a metaphorical sense, such as in literature or discussions about life, society, or events.
Example: "The world is a vast stage where every individual plays their part in the grand narrative of humanity."
Alternatives: "a grand arena" or "an expansive platform".
Video from the event shows him shouting from a vast stage in Russian: "Glory to Grozny!
Three years later, with a vast stage to roam, it's a joyful, uninhibited dance with unlikely elegance, a childlike fantasy.
Crucially, it boasts an opera house with a vast stage, capable of accommodating her grand-scale flights of the imagination.
As dawn turns to day, a magnificent, quintessentially East African scene opens up like a vast stage set revealed.
ATMOSPHERE A series of rooms with high ceilings, including an amber-glowing main dining room, provides a vast stage set for Middle Eastern food with a trendy twist.
It plays out under the stars on a vast stage, with a cast of hundreds and a vast replica of the Potala Palace.
Was it a literary walk, or was it a theatre show that simply used the city and buildings as a vast stage-history soaked backdrop to explore the work of the Actresses Franchise League?
Liberty sees an opportunity, a place on the vast stage that is college football, which is something akin to a religious experience in America.
The big hall has been temporarily converted to a musical theater holding nearly 7,000 people, and its vast stage, a historic platform for speeches by Communist Party leaders, is full of dancers, fiddlers, musicians and production staff, reports in The Guardian say.
Zeffirelli must have choreographed 500 singers, dancers and extras on the vast stage at a time, plus half-a-dozen horses, yet it didn't look crowded.
Mr. Dodge has found an aesthetically pleasing way of transforming the vast stage into a small, richly wood-paneled concert hall in which Callas can effectively take on her requisite larger-than-life dimensions.
