Source : Webster's Revised Unabridged Dictionary (1913)

Down \Down\, v. t. [imp. & p. p. {Downed}; p. pr. & vb. n.
   {Downing}.]
   To cause to go down; to make descend; to put down; to
   overthrow, as in wrestling; hence, to subdue; to bring down.
   [Archaic or Colloq.] ``To down proud hearts.'' --Sir P.
   Sidney.

         I remember how you downed Beauclerk and Hamilton, the
         wits, once at our house.                 --Madame
                                                  D'Arblay.

Source : WordNet®

downed
     adj : made to fall (as by striking or cutting or shooting or by
           illness or exhaustion); "the felled boxer lay stretched
           on the canvas"; "felled trees covered the hillside";
           "the downed oxen lay panting in the heat"; "a downed
           deer" [syn: {felled}] [ant: {unfelled}]