Source : Webster's Revised Unabridged Dictionary (1913)

Overhaul \O`ver*haul"\, v. t. [imp. & p. p. {Overhauled}; p. pr.
   & vb. n. {Overhauling}.]
   1. To haul or drag over; hence, to turn over for examination;
      to inspect; to examine thoroughly with a view to
      corrections or repairs.

   2. (Naut.) To gain upon in a chase; to overtake.

   {To overhaul a tackle}, to pull on the leading parts so as to
      separate the blocks.

   {To overhaul running rigging}, to keep it clear, and see that
      no hitch occurs.

Overhaul \O"ver*haul`\, Overhauling \O`ver*haul"ing\, n.
   A strict examination with a view to correction or repairs.

Source : WordNet®

overhaul
     n : periodic maintenance on a car or machine; "it was time for
         an overhaul on the tractor" [syn: {inspection and repair},
          {service}]
     v 1: travel past; "The sports car passed all the trucks" [syn: {pass},
           {overtake}]
     2: make repairs or adjustments to; "You should overhaul your
        car engine" [syn: {modernize}, {modernise}]