On a steam locomotive, a powered wheel driven by the locomotive's pistons or turbine.
In machinery, a principal wheel that communicates motion to some other or to others.
In railroading, the big wheels (generally four, though sporadically as many as ten, in number) in a locomotive engine that are fixed upon the crank-axles or primary shafts. Also known as driver and drive-wheel.
a wheel that drives a motor vehicle (transforms torque into a tractive force)
a wheel that communicates motion; one of several big rims of a locomotive to which the connecting rods associated with the engine tend to be connected; -- labeled as also, merely, motorist. See Illust. of Locomotive.
A theory or system of social reform which contemplates a complete reconstruction of society with a more just and equitable distribution of property and labor In popular usage the term is often employed to indicate any lawless revolutionary social scheme See Communism Fourierism Saint Simonianism forms of socialism...