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Source : Webster's Revised Unabridged Dictionary (1913)

Automatic \Au`to*mat"ic\, Automatical \Au`to*mat"ic*al\, a. [Cf.
   F. automatique. See {Automaton}.]
   1. Having an inherent power of action or motion.

            Nothing can be said to be automatic.  --Sir H. Davy.

   2. Pertaining to, or produced by, an automaton; of the nature
      of an automaton; self-acting or self-regulating under
      fixed conditions; -- esp. applied to machinery or devices
      in which certain things formerly or usually done by hand
      are done by the machine or device itself; as, the
      automatic feed of a lathe; automatic gas lighting; an
      automatic engine or switch; an automatic mouse.

   3. Not voluntary; not depending on the will; mechanical; as,
      automatic movements or functions.

            Unconscious or automatic reasoning.   --H. Spenser.

   {Automatic arts}, such economic arts or manufacture as are
      carried on by self-acting machinery. --Ure.

Source : WordNet®

     adj 1: operating with minimal human intervention; independent of
            external control; "automatic transmission"; "a budget
            deficit that caused automatic spending cuts" [ant: {manual}]
     2: like the unthinking functioning of a machine; "an automatic
        `thank you'"; "machinelike efficiency" [syn: {automatonlike},
         {machinelike}, {robotlike}]
     3: without volition or conscious control; "the automatic
        shrinking of the pupils of the eye in strong light"; "a
        reflex knee jerk"; "sneezing is reflexive" [syn: {reflex(a)},

     n 1: light machine gun [syn: {automatic rifle}, {machine rifle}]
     2: a pistol that will keep firing until the ammunition is gone
        or the trigger is released [syn: {automatic pistol}]
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