Source : Webster's Revised Unabridged Dictionary (1913)

Overturn \O`ver*turn"\, v. t. [imp. & p. p. {Overturned}; p. pr.
   & vb. n. {Overturning}.]
   1. To turn or throw from a basis, foundation, or position; to
      overset; as, to overturn a carriage or a building.

   2. To subvert; to destroy; to overthrow.

   3. To overpower; to conquer. --Milton.

   Syn: To demolish; overthrow. See {Demolish}.

Source : WordNet®

overturned
     adj : having been turned so that the bottom is no longer the
           bottom; "an overturned car"; "the upset pitcher of
           milk"; "sat on an upturned bucket" [syn: {upset}, {upturned}]