MOTOR

I. noun Etymology: Latin, from movēre to move Date: 1586 one that imparts motion, any of various power units that develop energy or impart motion: as, a small compact engine, internal combustion engine , a rotating machine that transforms electrical energy into mechanical energy, ~ vehicle , ~dom noun ~less adjective II. adjective Date: 1824 1. causing or imparting motion, of, relating to, or being a ~ neuron or a nerve containing ~ neurons , of, relating to, concerned with, or involving muscular movement , 2. equipped with or driven by a ~, of, relating to, or involving an automobile, designed for ~ vehicles or ~ists, III. verb Date: 1896 intransitive verb to travel by automobile ; drive , to move or proceed at a vigorous steady pace , transitive verb to transport by automobile