Definition of: motor

(mō′tər) noun
1. One who or that which produces motion, as a machine, nerve, etc.
2. An internal–combustion engine, especially one operating on gasoline.
3. A motorcar or motorcycle.
4. An electric motor.
—rotary motor An internal–combustion engine having multiple radial cylinders rotating about a fixed crankshaft.
—adjective
1. Causing, producing, or imparting motion.
2. Transmitting impulses from the nerve centers to the muscles.
3. Pertaining to consciousness of motion.
—v.i. To travel or ride in an automobile. [<L <motus, pp. of movere]
—mo′tor·ing adjective & noun