barrier - a structure or object that impedes free movement

auto, automobile, car, motorcar, machine - 4-wheeled motor vehicle; usually propelled by an internal combustion engine; "he needs a car to get to work"

mudguard, splash guard, splash-guard - a curved piece above the wheel of a bicycle or motorcycle to protect the rider from water or mud thrown up by the wheels

frame, framing, framework - a structure supporting or containing something

locomotive, locomotive engine, railway locomotive, engine - a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks

safety device, guard, safety - a device designed to prevent injury

auto, automobile, car, motorcar, machine - 4-wheeled motor vehicle; usually propelled by an internal combustion engine; "he needs a car to get to work"

device - an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"