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Entry 4 senses · 2 variants Webster, 1913

Motor

/mōt'-ẽr/ · Mo·tor · IPA /ˈmoʊtəɹ/
01 n. One who, or that which, imparts motion; a source of mechanical power.
  1. 1.
    One who, or that which, imparts motion; a source of mechanical power.
  2. 2.
    A prime mover; a machine by means of which a source of power, as steam, moving water, electricity, etc., is made available for doing mechanical work.(Mach.)
  3. 3.
    A motor car; an automobile.[archiac Colloq.]
02 a. Causing or setting up motion; pertaining to organs of motion; -- applied especially in physiology to those nerves or nerve fibers which onl…
  1. 1.
    Causing or setting up motion; pertaining to organs of motion; -- applied especially in physiology to those nerves or nerve fibers which only convey impressions from a nerve center to muscles, thereby causing motion.