What is a railway?

a railway is a track with engines it can be a mountain railway or just a railway

* Added - A railway is a fixed guideway system (vehicles cannot leave the track) and can be powered by gravity, animals (including people), stationary engines, or locomotives (any vehicle that is self propelled). A train is a "consist" of multiple vehicles designed to move on the railway.
As the term is used in conventional use today, a railway includes the track and all other wayside equipment, all the vehicles, stations, shops, and control centers.