In a craft with a pusher configuration (more commonly, simply pusher) the propeller(s) are mounted behind their respective engine(s). According to Bill Gunston, a "pusher propeller" is one mounted behind engine so that drive shaft is in compression. Pusher configuration describes also more commonly the specific layout of a fixed-wing aircraft of which the thrust device has a pusher configuration.
Pusher configuration describes this specific (propeller or ducted fan) thrust device attached to a craft, either aerostat (airship) or aerodyne (aircraft, WIG, paramotor, rotorcraft) or others types such as hovercraft, airboat and propeller-driven snowmobiles.
Pushers have been designed and built in many different layouts, some of them quite radical and some early definitions are no longer applicable.
Read more about Pusher Configuration: History, Engine Installation Considerations, Pusher Aerostatic Aircraft Configurations, Pusher Aerodyne Aircraft Configurations, Other Pusher Types, Most Built Pushers, Advantages, Disadvantages, Gallery