The Collaborative International Dictionary of English v.0.48:

Mechanic \Me*chan"ic\, n. [F. m['e]canique mechanics. See
   Mechanic, a.]
   1. The art of the application of the laws of motion or force
      to construction. [Obs.]
      [1913 Webster]

   2. A mechanician; an artisan; an artificer; one who practices
      any mechanic art; one skilled or employed in shaping and
      uniting materials, as wood, metal, etc., into any kind of
      structure, machine, or other object, requiring the use of
      tools, or instruments. Also, a technician who maintains or
      repairs machinery; as, an auto mechanic.
      [1913 Webster +PJC]

            An art quite lost with our mechanics. --Sir T.
                                                  Browne.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mechanic \Me*chan"ic\ (m[-e]*k[a^]n"[i^]k), a. [F. m['e]canique,
   L. mechanicus, Gr. mhchaniko`s, fr. mhchanh` a machine. See
   Machine.]
   1. Having to do with the application of the laws of motion in
      the art of constructing or making things; of or pertaining
      to mechanics; mechanical; as, the mechanic arts. "These
      mechanic philosophers." --Ray.
      [1913 Webster]

            Mechanic slaves,
            With greasy aprons, rules, and hammers. --Shak.
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   2. Of or pertaining to a mechanic or artificer, or to the
      class of artisans; hence, rude; common; vulgar.
      [1913 Webster]

            To make a god, a hero, or a king
            Descend to a mechanic dialect.        --Roscommon.
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            Sometimes he ply'd the strong, mechanic tool.
                                                  --Thomson.
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   3. Base. [Obs.] --Whitlock.
      [1913 Webster]

WordNet (r) 3.0 (2006):

mechanic
    adj 1: resembling the action of a machine; "from blank to blank
           a threadless way I pushed mechanic feet"- Emily Dickenson
    n 1: a craftsman skilled in operating machine tools [syn:
         machinist, mechanic, shop mechanic]
    2: someone whose occupation is repairing and maintaining
       automobiles [syn: automobile mechanic, auto-mechanic,
       car-mechanic, mechanic, grease monkey]