The Collaborative International Dictionary of English v.0.48:

Overthrow \O`ver*throw"\, v. t. [imp. Overthrew; p. p.
   Overthrown; p. pr. & vb. n. Overthrowing.]
   1. To throw over; to overturn; to upset; to turn upside down.
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            His wife overthrew the table.         --Jer. Taylor.
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   2. To cause to fall or to fail; to subvert; to defeat; to
      make a ruin of; to destroy; as, to overthrow a government.
      [1913 Webster +PJC]

            When the walls of Thebes he overthrew. --Dryden.
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            [Gloucester] that seeks to overthrow religion.
                                                  --Shak.
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   3. (Baseball) To throw (a baseball) beyond; to throw too high
      and too far; to overshoot[1]; as, the shortstop overthrew
      the first baseman.
      [PJC]

   Syn: To demolish; overturn; prostrate; destroy; ruin;
        subvert; overcome; conquer; defeat; discomfit; vanquish;
        beat; rout.
        [1913 Webster]